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                                                                    EXHIBIT 10.5

CERTAIN INFORMATION IN THIS EXHIBIT HAS BEEN OMITTED AND FILED SEPARATELY WITH
THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE
OMITTED PORTIONS. OMITTED INFORMATION HAS BEEN REPLACED BY [*].

                             OEM PURCHASE AGREEMENT

     This Agreement is entered into and made effective as of February 15, 1995,
by and between Symbios Logic, Inc., a corporation organized under the laws of
Delaware and having its principal place of business at 2001 Danfield Court, Fort
Collins, Colorado 80525 (hereinafter referred to as "Seller"), and AT&T Global
Information Solutions Company, a corporation organized under the laws of the
State of Maryland and having its principal office at 1700 South Patterson Blvd.,
Dayton, Ohio 45479 (hereinafter referred to as "AT&T").

     1.0 Background.

          1.1 AT&T is in the business of producing and marketing computer and
     information processing systems and related equipment, supplies and
     services. Seller manufactures and sells products related to the business of
     AT&T, and AT&T desires to purchase certain products from Seller. Seller is
     willing to sell such products to AT&T, subject to the terms and conditions
     set forth herein, to which the parties hereby agree.

          1.2 This Agreement is entered into contemporaneously with an Agreement
     for the Purchase and Sale of Assets between the parties (the "Purchase and
     Sale Agreement"), and terms not defined herein shaft have the meaning
     assigned in that Agreement.

     2.0 Definitions.  The following terms, in singular and/or plural forms of
the same term as and wherever used herein, shall have the meanings set forth in
this Section.

          2.1 "Products" -- RAID and mass storage subsystem products as
     described in the Specifications, together with associated software and
     Documentation and including any and all modifications, changes and
     improvements made to such Products during the term of this Agreement.

          2.2 "Part" -- Any component, subassembly or other module of Products
     or other products as described in Section 5.5.

          2.3 "Purchase Order" or "Order" -- Any purchase order issued by AT&T
     for the purpose of ordering Products or Parts pursuant to this Agreement.
     Purchase Orders may be submitted in written form, or in any electronic form
     to which the parties may mutually agree.

          2.4 "Seller Intellectual Property Rights" -- All United States and
     foreign patents, applications for patent, copyrights, mask works, trade
     secrets and other intellectual property rights relating to the design and
     manufacture of Products and Parts, and which are now or hereafter owned,
     controlled or possessed by Seller, including any such rights licensed to
     Seller by any third party.

          2.5 "Seller Know-How" -- All information and data of Seller (whether
     confidential or not) which is necessary and sufficient to manufacture,
     assemble, test, operate, maintain and repair Products and Parts, and which
     is now or hereafter owned, controlled or possessed by Seller, including all
     drawings, specifications, test information, software (including source and
     object code listings and supporting documentation), manuals, basic process
     steps and vendor lists.

          2.6 "Seller Technical Assistance" -- Assistance provided to AT&T by
     Seller in making use of the Seller Know-How in the manufacture, assembly,
     testing, operation, application, maintenance and repair of Products and
     Parts.

          2.7 "Specifications" -- The specifications for the Products attached
     hereto as Exhibit A, including any and all modifications, amendments or
     changes thereto made pursuant to this Agreement.

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          2.8 "Affiliate" -- Any person controlling, controlled by, or under
     common control with the referenced person. For the purposes of Section 15,
     any agent or contractor providing services to AT&T pursuant to a written
     agreement shall be deemed an Affiliate of AT&T.

     3.0 Purchase Orders.

          3.1 Placement of Purchase Orders.  Seller agrees to sell Products and
     Parts to AT&T in accordance with the terms and conditions of this
     Agreement. Specific quantities of Products and Parts shall be ordered by
     AT&T for purchase by the placement of Purchase Orders. However, this
     Agreement is not a Purchase Order. AT&T shall have no obligation to
     purchase any Products or Parts hereunder until AT&T has placed a Purchase
     Order, and then only to the extent of the Products or Parts covered under
     such purchase Order. Buyer and Seller shall develop a non-binding [*]
     forecast on a [*] for committed Products. In addition, at the 4th-Quarter
     quarterly storage technology meeting (Section 24.4), Buyer will provide
     under non-disclosure a non-binding [*].

          3.2 Acceptance or Rejection of Purchase Orders.  Seller agrees to
     accept and acknowledge, on AT&T's acknowledgement form, Purchase Orders
     placed by AT&T in conformance with the terms of this Agreement. Seller
     agrees to provide order acceptance and committed ship dates within [*] of
     Purchase Order. Seller shall not reject a Purchase Order for Products or
     Parts for reason of quantity purchased or delivery dates, whenever the same
     is within the availability and schedules for such Products or Parts
     specified in Exhibit B.

          3.3 Cancellation of Purchase Orders.  AT&T may terminate any Purchase
     Order [*]. AT&T's maximum liability to Seller on account of such
     cancellation shall be as specified on the AT&T Purchase Order. Further,
     AT&T shall have no liability to Seller if any Purchase Order is canceled as
     a result of this Agreement being terminated under Sections 8.2, 9.2, 10.3,
     10.5, or 18.2 (if termination is due to Seller's breach).

          3.4 Rescheduling of Products.  AT&T may [*], provided notice of such
     increase is given to Seller at least [*] prior to the scheduled delivery
     date, and provided that in its role as a supplier to Seller, GIS-Columbia
     is able to deliver key parts ordered under any Seller purchase order
     sufficient to [*]. Seller shall use its best efforts to deliver [*]. AT&T
     may [*] beyond the scheduled delivery date, provided notice of such [*] is
     given to Seller at least [*] prior to the scheduled delivery date. If
     Products rescheduled under this Section 3.4 are subsequently canceled,
     cancellation charges provided for in Section 3.3 above shall be based on
     the rescheduled delivery date rather than the original scheduled delivery
     date, [*] as a result of rescheduling, in which case AT&T will, at Sellers
     request, negotiate in good faith the appropriate cancellation charge, which
     shall in no event be [*].

          3.5 Purchase Commitment.  For a period of [*], AT&T Global Information
     Solutions Company will purchase at least [*] of its requirements for those
     Products identified on Exhibit B as "Committed Products" and Replacement
     Products of Committed Products therefor (as defined in Section 24.1),
     except if such Product has been discontinued. This commitment shall only
     exist to the extent that Seller is able to meet AT&T's specifications and
     requirements for price, performance, quality, and delivery schedule.

          3.6 Right to Offer New Products.  For a period of [*], AT&T Global
     Information Solutions Company shall use its Best Efforts to permit Seller
     to bid on the design, development, and/or manufacture of any new RAID or
     SCSI products (excluding SCSI hard disk drives and SCSI host adapters), and
     will exercise reasonable judgment in determining whether to accept an offer
     by Seller to design, develop, and/or manufacture such products, taking into
     account factors such as price, delivery time, performance, and suitability
     to AT&T's needs. This commitment shall not apply to AT&T development or
     procurement activity commenced prior to the Closing Date.

          3.7 Special Requirements.  The parties will cooperate in good faith to
     develop a procedure that will provide AT&T with expedited delivery of
     certain Products, in order to provide reasonable flexibility to AT&T to
     meet unique customer requirements. This procedure may, but will not
     necessarily, involve an

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     inventory consignment arrangement that will be memorialized in one or many
     Consignment Agreements by AT&T site or Product substantially in the form of
     Exhibit F.

     4.0 Prices.

          4.1 Product and Part Prices.  The prices for Products purchased
     hereunder shall be as specified in Exhibit B. The prices for Parts
     purchased hereunder shall be as specified on the Parts List provided to
     AT&T pursuant to Section 5.1, less the discount specified in Exhibit B.

          4.2 [*].  Seller represents that the prices charged for the OEM
     Products and Parts set forth in Exhibit B purchased hereunder by AT&T [*].
     However, the parties shall meet and negotiate in good faith price increases
     or decreases that may be appropriate by taking into account changes in
     market conditions, competition and cost reduction programs of Seller.

          4.3 Failure to Meet AT&T Requirements.  If Seller is unable, for any
     reason, to supply any portion of AT&T's requirements of the Products or
     Parts as established by Purchase Orders, such portion shall be considered
     to have been purchased from Seller for purposes of determining price when
     price is based on Product or Part quantity purchased by AT&T. This Section
     4.4 shall not, however, affect any other remedy to which AT&T may be
     entitled on account of Seller's inability to supply AT&T's requirements.

     5.0 Parts List, Identification and Availability.

          5.1 Parts List.  A complete Parts List for each Product shall be
     provided by Seller to AT&T at least [*] for Parts delivery specified in
     Exhibit B prior to the first delivery of that Product ordered by AT&T under
     this Agreement, showing for each Part.

           (1) Seller part number and generic name;

           (2) Manufacturer part number and name;

           (3) Current published list price;

           (4) Whether the Part is reworkable; and

           (5) Calculated actual mean-time-between-failure.

          5.2 Parts Identification.  All Parts which are subassemblies or
     modules and which are identified on the complete Parts List of Section 5.1
     above shall have permanently fixed markings, including:

           (1) Seller part number, and when available;

           (2) Date of manufacture.

          5.3 Recommended Parts List.  If not previously provided, Seller shall
     also provide to AT&T, upon execution of this Agreement, a recommended Parts
     List showing those Parts (and quantities) which Seller recommends be
     carried in stock.

          5.4 Parts Availability.  Seller shall make available to AT&T such
     Parts as AT&T may reasonably require for all Products purchased by AT&T
     from Seller. Seller further agrees to make the same available to AT&T
     pursuant to the pricing and other terms and conditions of this Agreement
     applicable to Parts for a period of not less than [*] (the "Parts
     Availability Period") after the date of delivery by Seller of the last unit
     of each Product delivered to AT&T or any other buyer that may require such
     Parts, and shall use its best efforts to give AT&T at least [*] written
     notice prior to the termination of that period. If, during the Parts
     Availability Period, Seller ceases production or acquisition of Parts,
     Seller shall notify AT&T at least [*] to cessation so that AT&T may, at its
     option, provide Seller with a reasonable forecast of ongoing requirements
     of Parts for the remainder of the period. This Parts availability
     requirement shall survive the term and any termination of this Agreement.

          5.5 Parts for Other Seller Products.  The provisions of Section 5.4
     shall apply to parts for all products previously manufactured by or for
     Seller's Wichita, Kansas facility, which parts were available from that
     facility immediately prior to the Closing Date. Seller will provide such
     parts for a parts

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     availability period which for each product shall be negotiated in good
     faith by the parties and which shall be calculated from the date of last
     shipment of each Product prior to the closing date. Prices for such parts
     shall be based on a reasonable markup over Seller's actual cost, and shall
     be negotiated in good faith.

     6.0 Lead Time, Shipment, and Payment.

          6.1 Lead Time for Products and Parts.  Purchase Orders for Products
     and regular (non-emergency) orders for Parts will be placed by AT&T in
     advance of the required delivery date thereof, allowing for the Lead Time
     specified in Exhibit B, unless a shorter Lead Time is mutually agreed to as
     to Products and Parts covered under specific Purchase Orders.

          6.2 Lead Time for Emergency Orders for Parts.  Seller agrees to accept
     emergency orders for Parts from AT&T by means of a facsimile or telex
     message or verbal communication containing a Purchase Order number, and to
     expedite placement of such emergency orders as if they were formal Purchase
     Orders. Seller shall provide AT&T a specifically designated "contact point"
     (including an individual's name, telephone number and facsimile number or
     cable address) for receipt of emergency orders for Parts. Seller shall use
     best efforts, including pulling critically needed Parts from production, to
     drop ship such emergency Parts at AT&T's sole expense to those locations
     specified by AT&T and provide notice to AT&T within [*] following receipt
     of the order specifying the airway shipment bill number and flight schedule
     information.

          6.3 Shipment.  Except as provided in Section 6.2, all Products and
     regular orders for Parts purchased under this Agreement shall be shipped
     F.O.B. Seller's plant of manufacture, freight collect, so as to be
     received, allowing for normal transit times, in accordance with the
     delivery schedule specified on the corresponding Purchase Order. If
     Shipment is late due to Seller's fault, Seller shall ship by air freight or
     other mode specified by AT&T, at [*].

          6.4 Delivery of Products After Agreement.  Purchase Orders placed
     during the term of this Agreement shall specify delivery [*] the term of
     this Agreement.

          6.5 Mode of Shipment.  The mode of shipment shall in each instance be
     by surface transportation unless otherwise specified by AT&T on the
     Purchase Order. In the absence of specific instructions, Seller will select
     the surface carrier for shipment.

          6.6 Risk of Loss.  Risk of loss and damage shall pass from Seller to
     AT&T upon delivery by Seller to the common carrier or AT&T's representative
     at the F.O.B. point described in Section 6.3 above, and all claims for
     damage thereafter shall be filed by AT&T directly with the carrier.

          6.7 Packaging.  All Products and Parts shall be packed by Seller in
     accordance with the latest revisions of AT&T Corporate Packaging Standards
     No. 10-001 (Packaging Testing Standard), No. 10-002 (Packaging Marking and
     Graphics) and No. 10-004 (Packaging of Service Parts, Feature Kits, Cables
     and Assembly Parts), attached hereto as Exhibit C, as well as other
     requirements set forth in the Specifications. Seller shall package Parts
     individually (except for small Parts, such as screws) with appropriate
     protective material to guarantee safe arrival (e.g., plug-in boards should
     be in static controlled packaging and in foam-lined packs or padded
     cartons). Each box shall contain Products or Parts ordered under a single
     Purchase Order, but multiple boxes may be placed in a larger container.
     Under no circumstances shall Seller utilize any packaging material
     consisting in whole or in part of polystyrene foam manufactured through a
     process using any of the following blowing agents: CFC-11, CFC-12, CFC-113,
     CFC-114, or CFC-115.

          6.8 Insurance.  AT&T shall have the responsibility to pay for
     insurance. However, at the request of AT&T, Seller shall make arrangements
     for purchase of insurance or supply required information, as AT&T may
     direct, to either AT&T or to AT&T's insurance carrier so as to ensure that
     AT&T will have timely information to effect insurance coverage.

          6.9 Payment.  It is understood and agreed that the terms of payment
     for all Products and Parts purchased under this Agreement shall be [*] from
     the date of AT&T's receipt of invoice for the first year
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     from the Effective Date and for all subsequent years, [*] be either (A) [*]
     from the date of AT&T's receipt of invoice or (B) [*] from the date of
     AT&T's receipt of invoice.

     7.0 Taxes.

          7.1 Taxes Not Included.  Product and Part prices as provided for in
     this Agreement are exclusive of all applicable federal, state or local
     sales, use, property, excise or similar taxes that may be levied upon
     Seller as a result of sale or delivery of any Product or Part sold under
     this Agreement. All such taxes shall be assumed and paid by AT&T. If a
     resale certificate or other such document of exemption is required in order
     to exempt the sale of Products or Parts from any such taxes, AT&T shall
     furnish Seller, at Seller's request, with such a certificate or document
     prior to shipment by Seller.

          7.2 Taxes Paid by Seller.  In the event that Seller is required to pay
     or at the request of AT&T so pays any such taxes, AT&T agrees to reimburse
     Seller therefor upon being appropriately invoiced for same in the exact
     amount as required of Seller.

     8.0 Program Managers, Product Qualification and Acceptance Procedure, and
Quality Assurance.

          8.1 Appointment of Program Managers.  Each party shall appoint Program
     Managers who shall be responsible for all communications with the other
     party, including those relating to Product qualification under Section 9,
     inspection, testing and quality control procedures under Section 10, and
     new product development under Section 23.

          8.2 Establishing Product Qualification and Acceptance (PQA)
     Procedure.  At least [*] the first scheduled general release shipment of
     Products or Parts to AT&T, Seller and AT&T shall confer, through their
     respective Program Managers, and agree on a Product Qualification and
     Acceptance (PQA) Procedure for each Product. Such PQA Procedure shall
     establish the procedures for qualification testing (Section 9.1), ongoing
     inspection and testing (Section 10.1), acceptance, inspection and testing
     (Section 10.2) and facility surveys (Section 10.3), as well as any
     physical, performance and quality requirements in addition to those
     provided in the Specifications in Exhibit A. In the event that the parties
     are unable or haven't, on or before such date, to reach an agreement as to
     the PQA Procedure, then AT&T may, at its option, terminate this Agreement.

          8.3 Quality Assurance.  Seller shall implement and maintain such
     quality assurance standards as are reasonably feasible to produce and
     deliver to meet AT&T Products and Parts that are defect-free, as well as to
     meet any other quality and reliability standards agreed to between the
     parties.

     9.0 Product Qualification.

          9.1 Qualification Testing.  Qualification testing of selected initial
     production units of each Product manufactured by Seller for AT&T shall be
     conducted and completed before the first scheduled shipment of that Product
     to AT&T. Such testing shall occur, at the option of AT&T, either at
     Seller's facility or on the premises of AT&T and shall be at the expense of
     the party on whose premises the testing is conducted. Qualification testing
     shall determine the acceptability of the Product in accordance with the
     Specifications, and shall be conducted in accordance with the PQA
     Procedure. Upon written agreement of Seller and AT&T that the qualification
     tests have been successfully completed, the initial deliveries of
     production units of that Product shall commence in accordance with the
     scheduled shipment established by issued Purchase Orders.

          9.2 Failure to Commence or Complete Qualification Testing.  If
     qualification testing has not been successfully completed in accordance
     with the PQA Procedure prior to the first scheduled shipment of any
     Product, then this Agreement shall, at AT&T's option, terminate with
     respect to that Product unless AT&T shall have agreed in writing to an
     extension of such testing, under like termination conditions as specified
     herein.

          9.3 Applicability.  This Section 9 applies only to Products and Parts
     that initially become subject to this Agreement after the Closing Date.

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     10.0 Inspection, Acceptance Testing, and Quality Control Standards.

          10.1 Ongoing Inspection and Testing.  Notwithstanding the successful
     completion of qualification testing under Section 9, all Products and Parts
     shall be subject, at either Seller's manufacturing facility or at AT&T's
     premises, to further inspection, acceptance testing, and review for
     conformance to ongoing quality control standards as may be established in
     the Specifications, PQA Procedure, and other standard industry practices
     and procedures.

          10.2 Acceptance Inspection and Acceptance Testing.  All Products and
     Parts shall be subject to acceptance inspection and testing by AT&T, [*],
     on Seller's premises, during normal business hours and following a
     reasonable notice to Seller, on AT&T's premises, [*] (including the
     premises of any customer of AT&T). When conducted on Seller's premises by
     Seller, copies of all documents prepared by Seller indicating the results
     of such inspection and testing shall be provided to AT&T at AT&T's request.
     Inspection and testing at AT&T's facilities or locations [*] shall be
     commenced for each Product and Part within the time set forth in Exhibit A
     for that product after arrival thereof. The inspection and testing shall be
     in accordance with the PQA Procedure and other quality control procedures
     and tests agreed upon by the parties.

          10.3 Facility Surveys.  Following reasonable notice to Seller, AT&T
     reserves the right to review, during regular business hours, Seller's
     physical facilities and Seller's quality control procedures, both prior to
     first Product deliveries and periodically thereafter, in order to assure
     compliance with the Specifications, PQA Procedure, and other standard
     industry practices and procedures. Seller shall maintain quality control
     procedures mutually agreed upon by AT&T and Seller as a result of such
     facility survey. In the event that AT&T determines in good faith, during
     any facilities survey, that Sellers procedure is insufficient to insure
     consistent acceptable quality, AT&T shall so advise Seller, specifying the
     deficiency AT&T believes exists and reasonable proposals for correction.
     Seller shall fully correct any deficiency [*]; provided, however, that if
     any deficiency would be considered "material" under any applicable ISO
     standard to which AT&T is certified, Seller shall correct that deficiency
     [*] to at least the extent necessary to reduce the deficiency to a level of
     "immateriality" under such standard, and shall thereafter fully correct the
     deficiency [*]. Failure to correct any deficiency within these time periods
     shall entitle AT&T to terminate this Agreement and cancel all
     then-outstanding Purchase Orders for Products and Parts without liability
     or consequence.

          10.4 Acceptance Testing Results.  AT&T shall provide notification to
     Seller upon completion of acceptance testing setting forth the specific
     date of acceptance or rejection of each Product and Part included in the
     notification. If any Product or Part is rejected, Seller shall thereafter
     proceed forthwith to correct the defects indicated by AT&T, either by
     repairing the defective Product or Part at the point of delivery or within
     Seller's facility, if possible, or by supplying a new Product or Part. The
     cost associated with any such repair or replacement, including
     transportation charges for return to Seller and subsequent return to AT&T,
     shall be borne by Seller. Products and Parts for which acceptance tests are
     not completed within the time set forth in Exhibit A for that Product or
     Part after arrival at AT&T's delivery destination shall be deemed to have
     been accepted by AT&T as of such time.

          10.5 Failure to Meet Minimum Standards.  If, during either
     qualification or acceptance testing, AT&T determines that any Product is
     not materially defect-free or cannot comply with minimum quality standards
     of the PQA Procedure or as otherwise established between the parties'
     respective Program Managers, this Agreement may be terminated with respect
     to that Product at AT&T's option and AT&T may cancel without liability or
     consequence any Purchase Order for that Product previously issued.

          10.6 Seller Personnel.  Seller shall provide, at AT&T's request and at
     locations selected by AT&T, and at no charge to AT&T, technically competent
     personnel of Seller to assist in the identification and resolution of any
     performance problems which may jeopardize the progress of the first
     installation of a Product. Seller shall also provide, at AT&T's request,
     any performance information available from any source which could aid AT&T
     in evaluation of Product performance.

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          10.7 No Waiver of Warranty.  In no event shall the inspection,
     qualification, and acceptance of any Product or Part pursuant to Section 9
     or this Section 10, or the payment for any such Product or Part by AT&T, in
     any way impair or reduce AT&T's rights under the warranty of Section 12 of
     this Agreement, or AT&T's rights to further inspection or testing.

          10.8 No Manufacturing License.  Termination of this Agreement by AT&T
     under any of the paragraphs of Section 9 or this Section 10, for failure of
     a Product to pass testing or inspection, shall not give rise to or
     otherwise be considered a cause entitling AT&T to a manufacturing license
     of that Product under this Agreement.

          10.9 AT&T shall provide no notice of default for deficiency under
     Section 10.3 for [*] from the Closing Date. AT&T may provide notices of
     deficiency prior to closing.

     11.0 Specification, Engineering and Other Changes.

          11.1 Changes in Specification.  The Specifications may be amended or
     otherwise changed from time-to-time by written agreement of Seller and
     AT&T. Prior to any such change becoming effective, all Products and Parts
     shipped by Seller to AT&T shall conform to the existing Specifications,
     unless AT&T shall otherwise request. After the effective date of any
     change, all Products and Parts shipped by Seller shall conform to such
     changed Specifications, except that Seller shall continue to make
     available, for the period specified in Section 5.4, Parts under all
     previous Specifications unless change to the Part does not affect its
     interchangeability with Parts manufactured before such time. Drawing
     corrections and minor changes which have no effect on interchangeability
     shall not be deemed to be a change in the Specifications.

          11.2 AT&T Channels.  AT&T may propose changes to the Specifications
     and, in such event, Seller shall consider the feasibility of any such
     proposal. Seller shall, within a reasonable period of time, not to exceed
     [*] after receipt of the AT&T proposal, furnish to AT&T in writing its
     comments regarding such proposed changes, including its willingness to
     implement the same, the price change, if any, and the time schedule
     required for implementation.

          11.3 Chance In Source of Parts.  Seller shall notify AT&T in advance
     of and the reasons for any change in the source (including addition of new
     vendors) of purchased Parts which affect form, fit, function, field
     maintenance or safety agency approval, and AT&T shall have the right to
     approve such source change, which approval will not be unreasonably
     withheld.

          11.4 Change Induced Problems.  In the event AT&T determines, after any
     engineering or any other change by Seller, that Products or Parts do not
     operate in accordance with the Specifications or fail to meet the
     Acceptance Test Procedure of Section 9, and upon AT&T's request, Seller
     shall promptly evaluate any defective Product or Part and shall notify AT&T
     of the result of its evaluation and its corrective action plan, if needed,
     within [*] after receipt of such request from AT&T.

          11.5 Parts Obsolescence.  In the event that any engineering or any
     other change made by Seller obsoletes any Parts purchased by AT&T, Seller
     shall so notify AT&T, in writing, and shall, at Seller's expense, [*].

          11.6 Changes in Parts.  In the event that any change to Products or
     Parts affects the interchangeability of latest version and previous version
     Parts, Seller shall provide a different part number for the latest version
     Parts. Seller will indicate whether each previous version is
     interchangeable with the latest version and whether the latest version is
     interchangeable with each previous version. All Products thereafter
     delivered by Seller shall be promptly identified to AT&T by serial number
     so as to reflect which version Part may be used therein.

          11.7 Engineering Change Documentation.  Seller shall, at its expense,
     provide AT&T with a copy of each Engineering Change Order (ECO) or like
     documentation issued by it during the term of this Agreement, and
     thereafter as long as Parts are made available under Section 5.4, with
     respect to operation or maintenance of a Product. Such copy shall be
     provided to AT&T as soon as practicable, but

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     no later than [*] after the issuance by Seller. AT&T may reject any change
     unless it has been agreed to pursuant to Section 11.1.

     12.0 Warranty and Product Liability.

          12.1 General Warranty.  Seller warrants that all Products and Parts
     will conform to the Specifications, will be of good material and
     workmanship, and will be free from defects in material, workmanship and
     programming. Claims for Products or Parts not complying with this warranty
     shall be submitted by AT&T the later of [*] of the non-complying Product or
     Part to AT&T or such other warranty period offered by Seller to any other
     Buyer or Customer (for example [*]). Seller shall at its option and
     expense, either promptly repair or replace non-complying Products or Parts
     or shall pay AT&T its costs of remedying such non-compliance (provided that
     AT&T shall have sought Seller's prior written consent, which shall not
     unreasonably be withheld, before incurring any such expense). The shipment
     of non-complying Products or Parts by AT&T to Seller, and the return
     shipment of repaired or replacement Products or Parts by Seller to AT&T
     under this Section 12.1, shall be at Sellers expense. AT&T shall receive a
     credit for any non-complying Products or Parts returned for repair or
     replacement.

          12.2 Safety and Regulatory Agency Requirements.  Seller further
     warrants that all Products and Parts will comply with all applicable
     federal, state and other governmental safety regulations in effect at the
     time of manufacture, will be listed with Underwriters Laboratory (UL) in
     the name of AT&T, and will comply with such other governmental regulations
     and be listed with such other certification organizations as are specified
     in Exhibit D.

          12.3 FCC Compliance.  Seller further warrants that all Products and
     Parts will comply with current rules and regulations of the Federal
     Communications Commission (FCC) concerning Electromagnetic Interference,
     including, without limitation, equipment labeling and instruction manual
     information requirements.

          12.4 Epidemic Failures.  Seller further warrants that Products and
     Parts will comply with the failure rate and/or safety and/or reliability
     requirements set forth in the Specifications. Claims for non-compliance
     will be established from AT&T's service records for that Product and by
     showing that the average failure rate of the monitored Products is not in
     conformance with the Specifications. In the event of such non-compliance,
     Seller shall correct the cause on all Products and Parts to be shipped
     thereafter and, at its sole option and expense, either repair or replace
     all Products and Parts shipped within the previous [*], or pay AT&T its
     costs of remedying such non-compliance (provided that AT&T shall have
     sought Sellers prior written consent, which shall not unreasonably be
     withheld, before incurring any such expense). If Seller disagrees with
     AT&T's determination of an Epidemic Failure, the matter will be submitted
     for dispute resolution in accordance with Section 9.7 of the Purchase and
     Sale Agreement, provided, however, that (a) the "Senior Executives"
     identified in Section 9.7(b) will be senior members of the Seller's OEM
     sales business, and the Buyer's supply line management or purchasing
     organizations; (b) the time period specified in Section 9.7(c) will apply;
     and (c) the parties shall request hearing pursuant to the AAA's rules for
     expedited hearing.

          12.5 Warranty Notwithstanding Acceptance.  Seller shall have the
     warranty obligations provided in this Section 12 as to all Products and
     Parts, notwithstanding their acceptance by AT&T.

          12.6 Product Liability Indemnification.  Seller agrees to protect,
     indemnify and hold AT&T harmless from and against all liability resulting
     from any and all claims by third parties for loss, damage or injury
     (including death) allegedly caused by any Product or Part purchased under
     this Agreement, to the extent not caused by misuse, abuse or other fault
     directly attributable to AT&T or its customer, and provided that Seller is
     promptly notified by AT&T of all such claims following AT&T's initial
     notification of such claims, and provided further that Seller is given full
     control over any negotiation, arbitration, or litigation concerning such
     claims.

          12.7 Product Liability Insurance.  Seller shall maintain, at its
     expense, Product Liability Insurance as [*] AT&T and its officers, agents
     and employees, from claims relating to the Products or Parts

                                        8
<PAGE>

          12.8 Survival.  The provisions of this Section 12 shall survive the
     term and any termination of this Agreement.

     13.0 Out-of-Warranty Repair.  Seller agrees to repair any out-of-warranty
Products or Parts which AT&T may elect to have repaired by Seller and which
Seller deems repairable. Seller further agrees to update all such repaired
Products and Parts to the latest engineering change and to mark or tag the same
to show the latest revision level. The cost to AT&T for such repair by Seller
shall be at the repair prices as negotiated in good faith and in accordance with
Section 4.2.

     14.0 Product Information and Training.

          14.1 Documentation.  If not previously provided to AT&T, and promptly
     following the issuance of any updates, Seller will furnish to AT&T, at
     Sellers expense, the following documentation for the Product(s):

             (1) User, Operator and Systems Administrator manuals, including
        marketing materials that describe functionality for maintenance.

             (2) Maintenance and Support documents, including, (i) engineering
        drawings of all assemblies and schematics, and logic and timing
        diagrams; (ii) adjustment, operational and functional specifications;
        (iii) service test procedures and a list of any special tools and
        service test equipment designed by Seller, (iv) site preparation and
        installation specifications and instructions; (v) when necessary to
        effect an interface or for maintenance purposes, Software and firmware
        source listings and related documentation; (vi) Parts information as set
        forth in Article 5; (vii) Training course materials as described in
        Paragraph 14.4; (viii) technical bulletins, engineering change orders
        and, if applicable, bulletin board access; and (ix) other documentation
        concerning the operation and maintenance of the Product which will
        permit AT&T to market, install and service the Products:

             (3) Evidence substantiating the escrow of any agreed upon
        information in accordance with Section 25.

             (4) Any necessary manufacturing documentation to support building
        Products to customer requirements.

Documentation will be of the type which is generally made available to Seller's
customers and/or used by Seller personnel, will be in a form suitable for
reproduction, and will be updated by new documentation from time-to-time as it
becomes available. AT&T will have the right to copy, modify and use, and have
copied, modified and used, the documentation provided by Seller for the purpose
of providing desired manuals or the like concerning the Product, provided that
any Seller copyrights therein are appropriately safeguarded, and AT&T will have
the right to copyright any manuals developed by AT&T.

          14.2 Publish End-User Documentation.  Seller will include with each
     Product unit purchased, a complete set of documentation relating to the
     operation and/or maintenance thereof as is customarily supplied to end
     users.

          14.3 Technical Support.  During the term of this Agreement and for [*]
     from the time of delivery of the last unit of a Product and Part to AT&T,
     Seller will provide at rates negotiated in good faith between the parties
     (except as to warranted Products and Parts for which technical support is
     included in the price of the Product or Part), access via telephone to
     technically competent personnel of Seller as may be reasonably required to
     assist in the identification and resolution of any Product performance
     problems. In the event Seller is unable to resolve problems remotely,
     Seller will, at AT&T's request, provide on-site technical support. Travel
     expenses for such out-of-warranty support shall be at AT&T's expense but
     shall be pre-approved by AT&T. Support requirements are further defined in
     Exhibit E.

          14.4 Training.

             (1) Seller will provide, at [*], adequate training and information
        to AT&T with respect to installation and service of each Product,
        including training on any special tools or test equipment. In the case
        of software, training will include instruction on features, functions
        and capabilities of the
                                        9
<PAGE>

        software. Training will take place upon request of AT&T and will be
        conducted by technically competent Seller personnel for the benefit of
        AT&T instructors, field service personnel and other AT&T personnel
        involved with the Product. The training will take place at a mutually
        agreed upon time and location.

             (2) Seller will provide AT&T a copy (including a syllabus) of all
        operator, maintenance and technical training course materials. Training
        materials will be of the type which is generally made available to
        Seller's customers and/or used by Seller personnel, will be in a form
        suitable for reproduction, and will be updated by new training materials
        from time to time as they become available. AT&T will have the right to
        copy, modify and use, and have copied, modified and used, the training
        materials provided by Seller for the purpose of providing desired
        training or the like concerning the Product, provided that any Seller
        copyrights therein are appropriately safeguarded, and AT&T will have the
        right to copyright any training materials developed by AT&T. All course
        materials will be kept current, with updates furnished to AT&T Global
        Information Solutions Company.

     15.0 Confidentiality.

          15.1 Non-Confidentiality Preferred.  We agree that it is preferable to
     conduct business under this Agreement on a non-confidential basis and agree
     to do so to the maximum extent possible. If it becomes necessary for us to
     exchange any confidential information, then, unless we otherwise agree in
     writing, the exchange of such information shall be governed by the balance
     of this Section 15.

          15.2 Information Received.  Each party shall use reasonable efforts,
     to the extent it does with respect to its own proprietary and confidential
     information of like nature, to prevent any of the other party's proprietary
     and confidential information which it receives under the scope of this
     Agreement in written form and designated "CONFIDENTIAL" from being
     disclosed to third parties.

          15.3 No Obligation.  Section 15.2 shall not apply and the receiving
     party shall have no obligation with respect to any information which:

             (1) is or becomes public knowledge through no wrongful act of the
        receiving party;

             (2) is already known to the receiving party;

             (3) is rightfully obtained by the receiving party from any third
        party without similar restriction and without breach of any obligation
        owed to the disclosing party;

             (4) is independently developed by the receiving party;

             (5) is furnished to a third party by the disclosing party without a
        similar restriction on the third party's rights;

             (6) is incorporated in a machine or apparatus (including a Product)
        which has been placed on sale;

             (7) is disclosed pursuant to a lawful requirement or request of a
        governmental agency;

             (8) is disclosed to the extent necessary to fulfill the business
        obligations of the receiving party to customers who are purchasers or
        lessees of a Product; or

             (9) is approved for release by written authorization of the
        disclosing party.

          15.4 Third Party Contractors.  Notwithstanding the restrictions of
     Section 15.2, AT&T shall be entitled to provide confidential information of
     Seller on a need-to-know basis to Affiliates who have executed a written
     obligation of confidentiality conforming to that of this Section 15.
     Notwithstanding the foregoing, Seller may from time to time identify to
     AT&T certain Affiliates to whom it does not wish Seller confidential
     information disclosed without prior notice from AT&T. From the date of
     receipt of Seller's notice, AT&T will use its Best Efforts to avoid
     disclosure to those Affiliates without first obtaining Seller's consent,
     which shall not be unreasonably withheld.

                                        10
<PAGE>

          15.5 Survival.  The obligations of the parties arising under this
     Section 15 shall survive for a period of [*] following the term or any
     termination of this Agreement.

     16.0 Indemnification for Infringement.

          16.1 Current Products.  AT&T understands and agrees that Seller
     provides no indemnification for intellectual property claims arising from
     AT&T's purchase, use, or resale of Products included on Exhibit A as of the
     Closing Date, or which fall within the scope of the indemnification
     provisions of Article 9 of the Purchase and Sale Agreement. Seller agrees
     that it will promptly notify AT&T if it becomes aware of any claim or
     threatened claim that any such Product infringes the intellectual property
     rights of a Third Party, and will render any reasonable assistance that
     AT&T may request in investigating or defending such a claim.

          16.2 Future Products.  With respect to Products which may be added to
     Exhibit A after the Closing Date, Seller undertakes and agrees that, upon
     being notified promptly and given authority, information, and offered
     assistance, Seller will promptly investigate and defend, at its own
     expense, all claims, allegations, suits, actions, or proceedings in which
     AT&T or its Affiliates, agents, distributors or customers, are made
     defendants or claimed potential defendants for any infringement, claimed
     infringement, or alleged inducement of infringement, or unauthorized, or
     unlawful use of any patent, copyright, trademark, trade secret, mask work,
     proprietary data, or other information, resulting from the sale, use, lease
     or other disposition of any Product or Part purchased from Seller under
     this Agreement; provided, however, that the provisions of this Section 16.2
     shall not apply to any claim, allegation, suit or proceeding that falls
     within the scope of the indemnification provisions of Article 9 of the
     Purchase and Sale Agreement. Seller further agrees to pay and discharge any
     and all judgments or decrees which may be rendered in any such suits or
     proceedings against any such defendants. Seller shall have the right to
     settle any such suits, actions, or proceedings on terms and conditions of
     Seller's own selection, provided they are not in conflict with the terms
     and conditions provided herein. In the event Seller fails to promptly
     investigate and defend or settle as provided hereinabove, then AT&T shall,
     following notification to Seller, have the right from that time forward to
     have sole control of the defense of such claim, allegation, suit, action,
     or proceeding and all negotiations for its settlement or compromise, and
     Seller agrees to pay, as they become due, all of the costs, expenses, and
     reasonable attorneys' fees incurred by AT&T and judgments or decrees which
     may be rendered against AT&T or such defendants in providing the services
     that Seller has failed to provide. This indemnity does not extend to any
     suit or proceeding which is based upon a patent claim covering a
     combination of which the Product or Part purchased under this Agreement is
     merely an element of the claim combined with other devices or elements not
     provided by Seller, unless Seller is a contributory infringer, nor does it
     extend to any Product or Part whose infringement is a direct result of
     Seller being required to adhere to a specific design provided by AT&T and
     not originating with Seller.

          16.3 Survival.  The provisions of this Section 16 shall survive the
     term and any termination of this Agreement.

     17.0 Identification of Product and Absence of Restrictions.

          17.1 Identification.  Any and all Products purchased from Seller under
     this Agreement may be marketed under any AT&T or Affiliate's trademark or
     any product name selected by AT&T, and Seller shall affix, when so
     requested by AT&T, such trademark or name, and serial numbers or nameplates
     as AT&T shall specify. The Product, in all AT&T advertising literature and
     elsewhere, may be referred to by AT&T as an AT&T product. All shipping
     containers shall bear the AT&T logo, Purchase Order number, class and
     serial number of the Product and all other information or markings desired
     by AT&T or required by law.

          17.2 Absence of Restrictions.  Except as may be required pursuant to
     any applicable export control law or regulation, AT&T sing not be
     restricted as to its sale or use of Products purchased hereunder including,
     without limitation, worldwide marketing to any end user or remarketer, and
     use by AT&T for the benefit of others. Further, this Agreement shall not be
     construed as preventing AT&T from acquiring

                                        11
<PAGE>

     at any time products similar or related to the Products from any other
     source, including, without limitation, purchase from any third party vendor
     or manufacturer by AT&T.

     18.0 Term and Termination.

          18.1 Term.  This Agreement shall continue for an initial term of [*]
     from its effective date and shall be automatically renewed for [*]
     thereafter, unless notice of termination is given by one party to the other
     at least [*] prior to the termination date of the initial term or of any
     [*] renewal term, or unless earlier terminated under any other provision of
     this Agreement.

          18.2 Termination for Default.  Either party may terminate this
     Agreement upon [*] prior written notice to the other party for failure of
     such other party to fulfill any of its material obligations hereunder,
     including failure due to causes specified in Sections 24.1 and 24.2;
     provided, however, if during the period of such notice the other party
     shall have remedied such failure, this Agreement shall continue in full
     force and effect as it would have had such failure not occurred. In the
     event of termination under this paragraph, the terminating party shall be
     entitled to return of any amounts paid in anticipation of performance not
     rendered by the other party. In the event of termination under this Section
     by Seller for AT&T's default, AT&T shall, upon Seller's written request,
     buy under any AT&T Purchase Order then outstanding all completed Products
     in Seller's possession as of the date of termination, at the per unit
     price(s) set forth on such Purchase Order, provided that AT&T shall have
     all rights of inspection, acceptance, and warranty provided by this
     Agreement with respect to such Products.

          18.3 Termination for Other Reasons.  This Agreement shall terminate
     forthwith, at the option of either party by notice in writing to the other
     party, upon the other party ceasing to carry on its business or in the
     event the other party becomes the subject of any proceedings under state or
     federal law for the relief of debtors or otherwise becomes insolvent,
     bankrupt, or makes an assignment for the benefit of creditors, or upon the
     appointment of a receiver for the other party, or its reorganization for
     the benefit of creditors.

     19.0 Rights After Termination.

          19.1 Other Remedies.  Termination of this Agreement by either party
     shall not prejudice it or the other party to recover any money amounts or
     require performance of any obligations due at the time of such termination.

          19.2 Completed Products.  In the event of termination of this
     Agreement by AT&T under Section 18.2, Seller shall, at AT&T's option, pass
     title and deliver to AT&T completed Products in its possession meeting the
     Specifications, provided AT&T pays a reasonable price not to exceed the
     price which would have applied if Seller had delivered those Products
     according to the terms of purchase hereunder and at the then current price
     established in Exhibit B. AT&T shall also have the option to purchase raw
     materials and/or work-in-process attributable to the Products or Parts.

          19.3 Purchase Orders Canceled.  In the event of any termination of
     this Agreement under Sections 8.2, 9.2, 10.3, 10.5, or 18.2 (if termination
     is due to Seller's breach), all outstanding Purchase Orders for Products
     and Parts previously issued by AT&T under this Agreement shall be
     automatically and immediately canceled without penalty, notwithstanding any
     firm order period, cancellation penalty or maximum cancellation requirement
     stated under this Agreement.

          19.4 Manufacturing License Not Affected.  Termination of this
     Agreement by either Seller or AT&T under Section 18.2 or by AT&T under
     Section 18.3 shall not prejudice or otherwise affect any Manufacturing
     License to which AT&T is or may become, entitled.

     20.0 Manufacturing License.

          20.1 Scope.  This Section 20 shall only apply to the extent that AT&T
     does not independently possess all rights necessary to manufacture the
     Product(s) in question.

          20.2 Manufacturing License for Cause.  In the event this Agreement is
     terminated by AT&T pursuant to Sections 18.2 or 18.3, or if Seller is, for
     any reason including discontinuation, unable to supply
                                        12
<PAGE>

     AT&T with AT&T's "reasonable requirements" of any Product ordered by AT&T
     under the terms of this Agreement, AT&T may require Seller to grant to AT&T
     an irrevocable, non-exclusive, [*] worldwide right and license under Seller
     Intellectual Property Rights and any other manufacturing or other rights of
     Seller necessary for AT&T to manufacture or have manufactured that Product
     and its Parts. Seller shall, under such circumstances and at such time,
     furnish to AT&T without cost all necessary assistance as will permit AT&T
     to commence manufacture of the Product(s) and Parts including, but not
     limited to, providing a complete documentation package of all Seller
     Know-How along with a reasonable amount of Seller Technical Assistance.
     [*]. For purposes of this Section 20.2, Seller shall be deemed unable to
     supply AT&T's "reasonable requirements" only if:

             (1) Seller fails to deliver the full quantity of any Product
        ordered by AT&T for any [*], and

             (2) [*]

[*]

     21.0 License of Software.

          21.1  As to software which may be provided under this Agreement
     (either separately or with a Product) and which is not fully licensed to
     AT&T pursuant to the Purchase and Sale Agreement or its ancillary
     agreements, Seller hereby grants to AT&T (under Seller's or its suppliers
     sublicensed patents, copyrights, and other intellectual property rights
     relating to that software) a perpetual, worldwide, non-exclusive,
     non-transferable license to resell or reproduce copies of the software in
     object code format only, onto a floppy disk or the hard disk of a system,
     one copy per system, and to distribute such copies to AT&T's customers. If
     the software package includes a "break the seal" license agreement in the
     package containing the software, AT&T may transfer the package to its
     customer without altering the package or its contents and the license
     agreement will be between Seller and the customer. If the software does not
     contain a "break the seal" license agreement or if AT&T opens the package
     for installation of the Software prior to resale, AT&T will license the
     software to its customers pursuant to its standard terms and conditions.

          21.2  Seller grants to AT&T a world-wide non-exclusive license to use
     Seller's trademarks and tradenames on or in connection with the software
     copies made under this license. No other rights to the software are granted
     by Seller to AT&T under this Agreement. Appropriate copyright notices will
     be placed on the software documentation and will be embedded in the
     software code and such notices will be retained on any copies made by AT&T.
     Both parties agree to take such reasonable steps as may be necessary to
     preserve copyrights to the software and software documentation.

     22.0 Assignment.

          22.1 No Assignment.  Neither this Agreement nor any right or
     obligations it governs may be assigned or delegated by either party without
     the prior written consent of the other party, which consent shall not
     unreasonably be withheld, except that either party may assign or delegate
     this Agreement to any Affiliate without the other's consent.

          22.2 Successor.  Notwithstanding anything in this Agreement to the
     contrary, this Agreement and all rights and obligations hereunder shall be
     binding upon and inure to the benefit of any successor to which either
     party directly or indirectly transfers all or a substantial part of its
     business and assets pertaining to the Products, whether by merger, sale of
     assets, sale of stock or otherwise. Upon request of the other party the
     party making such a transfer shall assign this Agreement and the rights and
     obligations hereunder and obtain from the assignee, in a form satisfactory
     to counsel for the other party, an acceptance of such assignment and an
     assumption of all of the assignor party's obligations under this Agreement.

     23.0 Notices and Communications.  Except as otherwise specifically provided
herein, notices and other communications by a party under this Agreement shall
be deemed given five (5) business days after the date

                                        13
<PAGE>

when deposited in the United States mails, registered mail postage prepaid,
addressed as follows or as from time to time otherwise directed in writing by
either party:

     To AT&T:

        AT&T Global Information Solutions Company
        17095 Via del Campo
        San Diego, CA 92127
        Attn: VP of Manufacturing

     with 1st class mail copy to

        AT&T Global Information Solutions Company
        1700 South Patterson Boulevard
        Dayton, Ohio 45479
        Attn: Business Law Section
            Law Department

     To Seller:

        Symbios Logic, Inc.
        2001 Danfield Court
        Fort Collins, Colorado 80525
        Attn: President & Law Dept.

     24.0 New Technology or Product and Discontinuation of Production.

          24.1 Replacement Products. Should Seller acquire or develop a type of
     product which is like the Product, or performs a similar function, or would
     obsolete the Product due to new technology (a "Replacement Product"),
     Seller shall give AT&T notice at least equal to the normal purchase
     lead-time prior to the initial shipping date for that Replacement Product
     and furnish to AT&T the specifications and other pertinent description
     thereof and, at the request of AT&T, arrange an engineering evaluation of
     such product immediately upon a working model of it becoming available. At
     its option, AT&T may elect to substitute such Replacement Product for the
     Product under this Agreement or add such it to this Agreement, at a price
     mutually agreeable between the parties. Such Replacement Product shall
     thereafter be considered the Product under the terms and conditions of this
     Agreement as if initially included hereunder. However, upon a substitution
     of such Replacement Product, Seller shall continue to make Parts available
     for the original Product under this Agreement, as required under Section
     5.4.

          24.2 Discontinuation of Production. In addition to any other notices
     that may be required in connection with termination of this Agreement by
     Seller, Seller shall provide notice of either at least [*] for Committed
     Products or [*] for Optional Products (plus the lead time specified in
     Exhibit B) prior to the discontinuation of production of a Product. The
     amount of notice per Product is specified in Exhibit B. If Seller ceases
     production or acquisition of a Product, during the notice period, AT&T may,
     at its option, provide Seller with a reasonable forecast of ongoing
     requirements of Product for the remainder of the notice period. This
     Product availability requirement shall survive the term and any termination
     of this Agreement.

          24.3 New Products. The parties contemplate that as Seller develops new
     RAID or SCSI products, they will be offered for sale to AT&T as Products
     under this Agreement. If any such product is made generally available for
     sale by Seller, Seller will promptly notify AT&T and, at AT&T's sole
     option, the parties will negotiate in good faith the price and other terms
     for its inclusion as a Product under this Agreement. The parties further
     contemplate that AT&T may request Seller to develop new Products. The
     parties agree to work together to develop processes and procedures for
     effective communication and management of the product development process.

          24.4 The parties agree to have [*] storage technology meetings in
     which, under non-disclosure, future product strategies (that are
     contractually disclosable) will be discussed.

                                        14
<PAGE>

     25.0 Software Source Code.

          25.1 Seller agrees that it will at all times maintain a complete
     package of source code or programs, statements, and software documentation
     (the "Documentation Package") corresponding to the software which AT&T does
     not have in its possession. Seller further agrees to maintain the
     aforementioned source programs, statements, and documentation current by
     updating the Documentation Package to include any modifications,
     improvements, enhancements or replacement programs within [*] after their
     availability.

          25.2 In the event that Seller ceases to carry on business on a regular
     basis, or fails or is unable to maintain any software licensed under this
     Agreement for any reason for a period of [*], Seller will deliver the
     Documentation Package(s) to AT&T. Delivery of the deposited materials will
     be made to AT&T after written request by AT&T, stating the grounds upon
     which the request is made. Once the deposited materials have been delivered
     to AT&T, AT&T will have the non-exclusive right to use the materials, [*],
     to maintain the software and software documentation for its present
     customer base. If Seller disagrees with AT&T's determination that the
     Documentation Package should be delivered, the matter will be submitted for
     dispute resolution in accordance with Section 9.7 of the Purchase and Sale
     Agreement, provided; however, that (a) the "Senior Executives" identified
     in Section 9.7(b) will be senior members of the Seller's OEM sales
     business, and the Buyer's supply line management or purchasing
     organizations; (b) the time period specified in Section 9.7(c) will apply;
     and (c) the parties shall request hearing pursuant to the AAA's rules for
     expedited hearing.

          25.3 In the event that AT&T reasonably believes that Seller will
     either cease carrying on business on a regular basis, or fail to provide
     software support as required by this Agreement, then AT&T may request, and
     Seller will agree, to negotiate in good faith the terms of an escrow
     agreement governing the Documentation Package(s).

     26.0 Miscellaneous.

          26.1 Excused Performance.  Neither party shall be liable for damages
     because of delays in or failure of performance required under this
     Agreement when such delay or failure is due to acts of God, acts of civil
     or military authority, fire, flood, strikes, war, epidemics, shortage of
     power, or other cause beyond such party's reasonable control and without
     its fault or negligence, provided that such party (a) uses best efforts to
     promptly notify the other in advance of conditions which will result in any
     such delay in or failure of performance, (b) uses best efforts to avoid or
     remove such conditions, and (c) immediately continues performance whenever
     such conditions are removed.

          26.2 Curtailed Production.  In the event that Seller's overall
     production of Products is curtailed for any reason, Seller will ship AT&T a
     percentage of its Orders for Products and Parts at least equivalent to that
     shipped for similar products to any other customer. Acceptance by AT&T of
     such percentage of its Orders shall not operate as a waiver of any rights
     or remedies which AT&T shall have as a result of Seller's failure to ship
     all Products and Parts under such Orders.

          26.3 Parties Bound.  All rights granted to either party in this
     Agreement may be exercised by any Affiliate agreeing to be bound by this
     Agreement.

          26.4 Entire Agreement.  This Agreement and Exhibits A-F annexed hereto
     contain the entire Agreement between the parties and may not be altered,
     amended or modified, except by formal agreement in writing signed by duly
     authorized representatives of both parties. Purchase Orders, Purchase Order
     acknowledgments, acceptance forms, and other printed documents shall not
     constitute an alteration, amendment or modification, even if acknowledged
     by the party sought to be bound.

          26.5 Waiver or Delay.  Any waiver or delay in the exercise by either
     party hereto of its right to terminate hereunder or to enforce any
     provision of this Agreement for any breach by the other party shall not
     prejudice such party's right of termination or enforcement for any further,
     continuing or other breach by the other party.

                                        15
<PAGE>

          26.6 Severability.  In the event that any provision contained in this
     Agreement should, for any reason, be held to be invalid or unenforceable in
     any respect under the laws of any jurisdiction where enforcement is sought,
     such invalidity or unenforceability shall not affect any other provision of
     this Agreement and this Agreement shall be construed as if such invalid or
     unenforceable provision had not been contained herein.

          26.7 Arbitration and Governing Law.  Any controversy or claim, whether
     based on contract, tort or other legal theory (including but not limited to
     any claim of fraud or misrepresentation), arising out of or related to this
     Agreement, or any subsequent agreement between the parties, shall be
     resolved by arbitration pursuant to Section 9.7 of the Purchase and Sale
     Agreement.

          26.8 Headings.  The Section headings within this Agreement are for
     convenience only and shall neither be considered a part of, nor affect the
     construction or interpretation of, any provision of this Agreement.

          26.9 Toxic Materials.  Nothing used in the manufacture of the Products
     and/or Parts covered by this Agreement shall contain Polychlorinated
     Biphenyl (PCB) or Cadmium.

          26.10 Duty Drawback.  AT&T shall be entitled to claim duty drawback on
     Products and Parts exported by or for AT&T. Seller shall submit, with each
     shipment of Products and Parts containing imported components, a
     Certificate of Delivery of Imported Merchandise (Customs Form 331 or 7543),
     shall retain all records required by US statues and regulations and
     identified in any drawback contract covering Products and Parts, and shall
     otherwise assist AT&T as reasonably requested in order to claim duty
     drawback for Products and Parts.

          26.11 Country of Origin.  Seller shall provide to AT&T, prior to the
     first delivery of any Product and Part hereunder, a certificate of origin
     stating the country of origin for such Product or Part. If the country of
     origin for any Product or Part should change, Seller shall provide a new
     certificate of origin prior to the first delivery of any Product or Part
     affected by such change.

          26.12 Compliance with Laws.  Seller shall, in the manufacture and sale
     of the Products and Parts to AT&T, and in all other performance under the
     provisions of this Agreement, fully comply with all applicable federal,
     state, local and other governmental laws and regulations.

          26.13 Personal Warranties.  Seller and AT&T represent and warrant to
     each other that each has the right and power to enter into this Agreement.
     Seller further warrants that it has not knowingly violated and will not
     knowingly violate any patent, copyright, trade secret or other property
     rights of any third party with regard to the development and manufacture of
     any Product.

          26.14 Relationship of Parties.  The relationship of Seller and AT&T as
     established under this Agreement shall be and at all times remain one of
     independent contractors, and neither party shall at any time or in any way
     represent itself as being a dealer, agent or other representative of the
     other party or as having authority to assume or create obligations or
     otherwise act in any manner on behalf of the other party.

          26.15 Periods of Time.  In computing any period of time under this
     Agreement where a specified number of days are required or permitted for
     notice, response, or other action on the part of either party, Saturdays,
     Sundays, and holidays shall be included in such period of time.

          26.16 Disclaimer and Limitation of Liability.  IN NO EVENT SHALL
     EITHER PARTY BE LIABLE TO THE OTHER FOR ANY SPECIAL, INCIDENTAL OR
     CONSEQUENTIAL DAMAGES UNDER THIS AGREEMENT REGARDLESS OF WHETHER THE PARTY
     HAS BEEN NOTIFIED OF THE POSSIBILITY OF ANY SUCH DAMAGES.

          26.17 Precedence.  In the event of any conflict between this Agreement
     and the Purchase and Sale Agreement, the terms of this Agreement shall
     prevail.

                                        16
<PAGE>

     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed in duplicate by their respective authorized representatives.

<Table>
<S>                                             <C>
SELLER                                          AT&T GLOBAL INFORMATION SOLUTIONS COMPANY

By: /s/ Illegible                               By: /s/ Illegible
---------------------------------------------   ---------------------------------------------
Title: President & CEO                          Title: Assistant Secretary
---------------------------------------------   ---------------------------------------------
Date: February 7, 1996                          Date: January 16, 1996
---------------------------------------------   ---------------------------------------------
</Table>

                                        17
<PAGE>

                 FIRST AMENDMENT TO THE OEM PURCHASE AGREEMENT
                    BETWEEN SYMBIOS LOGIC INC. AND AT&T GIS
                            DATED FEBRUARY 15, 1995

     This First Amendment ("Amendment") to the OEM Purchase Agreement dated
February 15, 1995 ("Agreement") between Symbios Logic Inc. ("Symbios") and AT&T
Global Information Solutions Company, now known as NCR Corporation ("NCR") is
entered into by the parties and made effective this 2nd day of January, 1996
("Amendment Effective Date"). Capitalized terms used but not defined herein
shall have the meaning ascribed to them in the Agreement. This Amendment shall
be coterminous with the Agreement.

     I. Section 2.0. DEFINITIONS, is hereby amended as follows:

     The following is added at the end of Paragraph 2.8 "Affiliate":

          Affiliate shall not include such persons or entities who are engaged
     in businesses directly competitive with those of Seller without Seller's
     advance written consent in each case, which consent shall not be withheld
     in bad faith.

     II. Section 3.0. PURCHASE ORDERS, is hereby amended as follows:

     The following is added to Paragraph 3.1 "Placement of Purchase Orders"
after the fourth sentence (ending in "such Purchase Order.") and replaces the
balance of the paragraph:

          NCR will provide Symbios will a [*] of its estimated requirements for
     Products covered under this Agreement. Symbios will indicate its
     concurrence or otherwise with such forecasts in writing to NCR. Symbios
     will secure resources required to meet the forecast. NCR will update its
     forecasts on a [*]. At no additional cost, NCR will have the following
     percentage quantity upside and downside flexibility within its
     forecast/Purchase Orders:

          Flexibility

<Table>
<Caption>
   DAYS PRIOR TO CSD           STANDARD MODELS          NON-STANDARD MODELS
------------------------   ------------------------   ------------------------
<S>                        <C>                        <C>
          [*]                        [*]                        [*]
          [*]                        [*]                        [*]
          [*]                        [*]                        [*]
          [*]                        [*]                        [*]
          [*]                        [*]                        [*]
          [*]                        [*]                        [*]
</Table>

          Symbios will use commercially reasonable efforts to accommodate NCR's
     requests for upside or downside flexibility beyond the above flexibility
     limits. Symbios is not obligated to meet NCR's improved flexibility
     requests if Symbios cannot reasonably comply with such requirements.

     Paragraph 3.2 is changed to read as follows:

     3.2 Acceptance or Rejection of Purchase Orders and Shipment Fidelity

          Symbios agrees to accept and acknowledge, on NCR's acknowledgment
     form, Purchase Orders placed by NCR in conformance with the terms of this
     Agreement. Symbios will use commercially reasonable efforts to establish
     Committed Ship Dates (CSD) in accordance with section 6.1. Symbios agrees
     to provide written order acknowledgment to a Purchase Order and provide a
     CSD within [*] for Standard Models and within [*] for Non-Standard Models
     after receipt of a Purchase Order. A Standard Model is defined as a Product
     or kit which is part of a subset of Products that represents in aggregation
     at least [*]. Standard Models are listed in Exhibit Al. The initial list of
     Standard Models is comprised of [*]. Exhibit A1 may be updated at any time
     by the addition or deletion of Products by the mutual agreement of both
     parties. A Non-Standard Product is defined as all other Products or kits
     offered by Symbios that are not classified as a Standard Model. Symbios
     will be measured by actual ship date versus

                                        1
<PAGE>

     the latest mutually agreed upon written CSD provided on the order
     acknowledgement. Symbios may not modify the CSD unless permitted to do so
     by NCR in writing. Symbios agrees to provide NCR a weekly report detailing
     NCR ship date performance by product. Specific metrics for CSD performance
     are as follows:

<Table>
<Caption>
                                         PERCENT
BEGINNING TIME                PERCENT      [*]
    PERIOD        PRODUCT     ON-TIME   DAYS LATE
--------------  ------------  -------   ----------
<S>             <C>           <C>       <C>
   03/01/96     All Products    [*]        [*]
   04/01/96     All Products    [*]        [*]
   07/01/96     All Products    [*]        [*]
   10/01/96     All Products    [*]        [*]
   04/01/97     All Products    [*]        [*]
</Table>

          The metric for actual shipment performance for each respective quarter
     will be measured at the end of the quarter.

          Symbios will not reject a Purchase Order for Product or Parts for
     reason of quantity purchased or delivery dates, whenever the same is within
     the availability and schedules for such Products or Parts specified in
     Section 6.1.

     Paragraph 3.3 "Cancellation of Purchase Orders" is amended as follows:

          The sentence "AT&T's maximum liability to Seller on account of such
     cancellation shall be as specified on the AT&T Purchase Order." in lines
     3-4 is stricken in its entirety.

     Paragraph 3.3 is further amended by adding the following language at the
end of the paragraph:

          NCR agrees to share in expenses incurred by Symbios due to order
     cancellations. NCR shall be responsible for the amount of the cost of
     non-returnable long lead components procured by Symbios to support NCR's
     forecast, provided there is a joint discussion and understanding of the
     involved costs. Symbios may additionally charge NCR a material burden
     charge equal to the actual charges incurred by Symbios in canceling and
     returning components to the original supplier, not to exceed [*] of the
     returned components.

     Paragraph 3.5 "Purchase Commitment" is stricken in its entirety. Paragraph
3.6 "Right to Offer New Products" is renumbered to 3.5, and the Paragraph
entitled "Special Requirements" is numbered as 3.6.

     A new Paragraph 3.7 is added as follows:

     3.7 Evaluation/Benchmark Units.

          3.71. Symbios will loan NCR the equipment listed below, and may loan
     NCR certain related hardware, software, firmware, documentation, and
     information for NCR's use with that equipment. Each piece of equipment may
     be used by NCR for a period of [*]. However, NCR shall have up to [*] from
     the date of shipment by Symbios in which to return the equipment to Symbios
     (to cover repackaging, transit, etc.). NCR shall issue orders for these
     units of evaluation equipment from a single point of contact. When returned
     to Symbios, the units will be refurbished, at the charges indicated below,
     to "as-new" condition and will have the same warranty as a new unit. Units
     refurbished by Symbios will be completely updated to the latest revision
     levels. If an evaluation or benchmark unit of equipment is not returned
     within 135 days of receipt by NCR, Symbios may bill NCR upon notification
     to NCR of its intent to do so, and NCR agrees to pay any such bill, which
     billed amount shall be equal to the full price for such units NCR shall be
     responsible far shipping charges for the initial shipment out and the
     return shipment associated with the evaluation equipment.

                                        2
<PAGE>

<Table>
<Caption>
          REFURBISH
MODEL #    CHARGE
-------   ---------
<S>       <C>
 [*]       [*]
 [*]       [*]
 [*]       [*]
 [*]       [*]
 [*]       [*]
</Table>

          3.7.2 During the equipment loan period, NCR will use reasonable
     efforts to maintain the equipment in good operating condition other than
     normal wear and tear and damage attributable to product defects. In the
     event a loaner unit has damage beyond normal wear, NCR agrees to pay the
     actual costs associated to repair the unit, provided that Symbios issues an
     itemized list of repairs prior to the actual work being performed. Symbios
     will provide standard warranty coverage during the loan period.

          3.7.3 Unless otherwise agreed in writing, NCR will not buy refurbished
     units of Products that were evaluated by anyone other than NCR. Symbios
     shall apply refurbished units used previously through the NCR
     evaluation/benchmark program to new NCR Orders. NCR may direct that certain
     Orders not be filled with refurbished units by including a statement to
     that effect on the Order itself and/or by providing Symbios a list of
     customers who will not accept refurbished systems. Notwithstanding the
     foregoing. NCR agrees to accept all refurbished units which have not been
     shipped against NCR Orders after [*] by Symbios and shall be billed at and
     agrees to pay full price for such units.

     III.  SECTION 4.0.  PRICES, is hereby amended as follows:

     The following is added to the end of Paragraph 4.1 "Product and Part
Prices":

          Additional Product and Part prices are set forth in Exhibit B1, which
     prices may be further negotiated based upon changes in market condition or
     any other appropriate factor. In the event that differing prices for the
     sane Product(s) are specified in Exhibit B and Exhibit B1, the price set
     forth in Exhibit B1 shall be the correct price. Product and Parts prices
     specified in Exhibit B, Exhibit B1 the Parts List shall be [*] to the
     extent permitted by Exhibit B, Section 3.0.

     A new paragraph 4.4 is added as follows:

          4.4 Disk Drive Price Reductions.  Symbios will pass through to NCR [*]
     that Symbios receives from its supplier(s). Price reductions to NCR on disk
     drives will become effective [*] following the date of the price reduction
     provided by Symbios' supplier. This Section 4.4 will become effective on
     April 01, 1996.

     IV.  SECTION 5.0.  PARTS LIST, IDENTIFICATION AND AVAILABILITY, is hereby
amended as follows:

     Paragraph 5.4 "Parts Availability":

          Line 8:  "for integrated controllers and [*] written notice prior to
     the termination of that period for subsystems" is inserted at the end of
     the second sentence after "of that period".

     V.  Section 6.0.  LEAD TIME, SHIPMENT, AND PAYMENT, is hereby amended as
follows:

     Paragraph 6.1 is changed to read as follows:

          6.1 Lead Time for Products and Parts.  Purchase Order for Products and
     regular (non-emergency) orders for Parts will be placed by NCR in advance
     of the required delivery date thereof allowing for the Lead Time specified
     in the chart below, unless a shorter Lead Time is mutually agreed upon as
     to Products and Parts covered under specific Purchase Orders. Symbios will
     use commercially reasonable efforts to execute and improve the Product Lead
     Time. The Lead Time shall mean the maximum period between Symbios' receipt
     of a Purchase Order, and the actual shipment to NCR's specified delivery
     location. The Lead Times for Products are contingent upon NCR providing a
     monthly forecast with

                                        3
<PAGE>

     flexibility limits as specified in Section 3.2. The Lead Times shall be as
     set forth below, but shall not apply to Purchase Orders with longer Lead
     Times requested by NCR.

<Table>
<Caption>
BEGINNING TIME PERIOD   PRODUCT   LEAD TIME
---------------------   -------   ---------
<S>                     <C>       <C>
January 2, 1996           [*]        [*]
                          [*]        [*]
                          [*]        [*]
                          [*]        [*]
                          [*]        [*]
October 1, 1996           [*]        [*]
                          [*]        [*]
                          [*]        [*]
                          [*]        [*]
                          [*]        [*]
April l, 1997             [*]        [*]
</Table>

     VI.  Section 8.0.  PROGRAM MANAGERS, PRODUCT QUALIFICATION AND ACCEPTANCE
PROCEDURE, AND QUALITY ASSURANCE, is hereby amended as follows:

     The last sentence of Paragraph 8.2 "Establishing Product Qualification and
Acceptance (PQA) Procedures" is changed to read as follows:

          In the event that the parties do not, on or before such date, reach an
     agreement as to the PQA Procedure for a Product or Part, then NCR, may, at
     its option, terminate this Agreement with respect to that Product or Part.

     VII.  Section 12.0.  WARRANTY AND PRODUCT LIABILITY, is hereby amended as
follows:

     Paragraph 12.1 is changed to read as follows:

          12.1 General Warranty

             12.1.1 [*]. (The text of Paragraph 12.1 of the Agreement is
        inserted here in its entirety.)

             12.1.2 [*]. A dispatch shall mean any time that as NCR Customer
        Service Engineer is required to make an onsite service call during the
        warranty period for the Product where a defect has been corrected which
        in NCR's reasonable opinion was covered by the applicable Symbios
        warranty. Multiple dispatches may occur in closing an open "incident".

             12.1.2.1 To effect this reimbursement, NCR shall be responsible for
        notifying Symbios of the warranty dispatch and shall provide the
        following information:

                a.  The tracer/serial number of the system

                b.  The Part(s) required for the dispatch

                c. The NCR trouble ticket number

                d. The Part(s) ship to location and contact information

             12.1.2.2 Immediately upon notification by NCR, Symbios will verify
        the warranty entitlement on the system and for those systems which are
        so verified will ship the required Part(s) and issue an RMA for the
        Part(s) to be returned to Symbios. Symbios guarantees [*] for requests
        received and verified by Symbios prior to [*]. NCR shall be responsible
        for returning the failed Part(s) from the system in the same package or
        equivalent as the replacement Part(s) arrive in. Symbios may bill NCR
        far any such warranty claim Part(s) not so returned to Symbios within
        [*] at the applicable rate for NCR.

                                        4
<PAGE>

             12.1.2.3 NCR will invoice Symbios [*] for the warranty dispatches.
        Such billing will include the date of the dispatch, NCR trouble ticket
        number and the Symbios RMA number for each warranty dispatch.

             12.1.2.4 Symbios will conduct or subcontract failure analysis on
        all Parts returned from NCR. On a [*] basis Symbios and NCR will
        calculate the ratio of no trouble found (NTF), if any, on the Part(s)
        returned to Symbios by NCR. If the NTF rate exceeds [*].

          12.1.3 [*]

     Paragraph 12.4 "Epidemic Failures" is modified as follows:

          Line 8:  The clause "in the lot containing the actual or potential
     defect(s) and/or defective component(s) which lead to breach of this
     warranty" is inserted after "Parts".

     A new Paragraph 12.8 is added as follows:

          12.8 Field Retrofit Orders (FRO).  Either NCR or Symbios may request
     that an FRO be generated. Upon agreement that the FRO is needed, Symbios
     will provide part numbers. estimated time of process, and instruction. NCR
     will be responsible for writing the actual FRO. For all Products shipped by
     Symbios after the Amendment Effective Date, Symbios Logic agrees to
     reimburse NCR for NCR's labor for each FRO installed by NCR on the Products
     at a rate of [*]. The reimbursement applies to those FROs where Symbios
     Logic and NCR agree that end customer impact merits such treatment. It is
     agreed that product safety and potential for catastrophic data loss are the
     catastrophic data loss are the primary criteria for FRO labor
     reimbursement. Payment will be based on the [*]. In the event that NCR and
     Symbios are unable to agree on the need for a reimbursable FRO, the parties
     may elect to resolve the issue through arbitration as set forth in
     Paragraph 26.7.

     Paragraph 12.8 of the Agreement is renumbered to Paragraph 12.9.

     VIII.  Section 20.0.  MANUFACTURING LICENSE, is hereby amended as follows:

     Paragraph 20.2 "Manufacturing License for Cause" is changed to read as
follows:

          In the event that Seller discontinues its business operations with
     respect to the Products provided hereunder, NCR may require Seller to grant
     to NCR an irrevocable, non-exclusive, [*] worldwide right and license under
     Seller Intellectual Property Rights and any other manufacturing or other
     rights of Seller necessary for NCR to manufacture or have manufactured the
     Products and Parts. Seller shall, under such circumstances and at such
     time, furnish to NCR all necessary assistance as will permit NCR to
     commence manufacture of the Product(s) and Parts including, but not limited
     to, providing a complete documentation package of all Seller Know-How along
     with a reasonable amount of Seller Technical Assistance. In addition,
     Seller agrees to sell or lease to NCR, if NCR desires, and based on its
     then fair market value, [*].

     IX.  Section 21.0.  LICENSE OF SOFTWARE, is hereby amended as follows:

     The following is added at the end of Paragraph 21.1:

          NCR shall pay to Seller a royalty for each copy of the software
     distributed by NCR to its customers hereunder.

     X.  Section 24.0.  NEW TECHNOLOGY OR PRODUCT AND DISCONTINUATION OF
PRODUCTION, is hereby amended as follows:

          The first two sentences of Paragraph 24.2 "Discontinuation of
     Production" are stricken and replaced with the following:

          In addition to any other notices that may be required in connection
     with termination of this Agreement by Seller, Seller shall provide notice
     at least [*] prior to the discontinuation of integrated controllers and [*]
     prior to the discontinuation of production of a subsystem.

                                        5
<PAGE>

     Except as amended by this Amendment, all other terms and conditions of the
Agreement remain the same.

THE PARTIES HAVE CAUSED THIS AMENDMENT TO BE EXECUTED BY THEIR AUTHORIZED
REPRESENTATIVES EFFECTIVE AS OF THE AMENDMENT EFFECTIVE DATE.

<Table>
<S>                                                <C>
NCR CORPORATION                                    SYMBIOS LOGIC INC.
(FORMERLY AT&T GLOBAL INFORMATION
SOLUTIONS COMPANY)

Signed: /s/ WILLIAM [ILLEGIBLE]                    Signed: /s/ GLENN S. GAINLEY
       -------------------------------------       -------------------------------------

Printed:                                           Printed: Glenn S. Gainley
        ------------------------------------       ------------------------------------

Title:                                             Title: Vice-President, Business Units
     ---------------------------------------       ---------------------------------------

Date:                                              Date: 1-14-98
     ---------------------------------------       ---------------------------------------
</Table>

                                        6
<PAGE>

                 SECOND AMENDMENT TO THE OEM PURCHASE AGREEMENT
                    BETWEEN SYMBIOS LOGIC INC. AND AT&T GIS
                            DATED FEBRUARY 15, 1995,
            AS AMENDED BY THE FIRST AMENDMENT DATED JANUARY 2, 1996

     This Second Amendment ("Second Amendment") to the OEM Purchase Agreement
dated February 15, 1995 ("Agreement") between Symbios Logic Inc. ("Symbios") and
AT&T Global Information Solutions Company, now known as NCR Corporation ("NCR"),
as amended by the First Amendment dated January 2, 1996 ("First Amendment"), is
entered into by the parties and made effective this 5th day of March, 1997
("Second Amendment Effective Date"). Capitalized terms used but not defined
herein shall have the meaning ascribed to the in the Agreement or the First
Amendment, as applicable. This Second Amendment shall be coterminous with the
Agreement.

     I.  Section 3.0, PURCHASE ORDERS, is hereby amended as follows:

     Paragraph 3.7, added to the Agreement in the First Amendment, is hereby
modified to read as follows:

          3.7  Evaluation/Benchmark Units.

             3.7.1 Symbios will loan NCR the equipment listed below, and may
        loan NCR certain related hardware, software, firmware, documentation,
        and information for NCR's use with that equipment. Symbios shall
        determine the total value of the equipment permitted to be loaned to NCR
        based on [*], and Symbios shall have the right, at its sole discretion,
        to change such limitation at any time upon notice to NCR. Any such
        change shall not affect loaned equipment in NCR's possession as of the
        effective date of such change, which equipment NCR shall be permitted to
        continue to use until the expiration of the applicable loan period. In
        the event that the total value of the equipment loaned to NCR is
        permitted to exceed such limitation, NCR shall pay to Symbios each [*].
        The [*] carrying charge shall be payable throughout the loan period,
        calculated from the date on which the units are shipped from Symbios to
        the date on which the units are returned to Symbios, with [*]. Each
        piece of equipment may be used by NCR for a period of [*]; however, NCR
        shall have up to [*] by Symbios in which to return the equipment to
        Symbios (to cover repackaging, transit, etc.). NCR shall issue orders
        for these units of evaluation equipment from a single point of contact.
        When returned to Symbios, the units will be refurbished, at the charges
        to NCR indicated below, to "as-new" condition and will have the same
        warranty as a new unit. Units refurbished by Symbios will be completely
        updated to the latest revision levels. If an evaluation or benchmark
        unit is not returned within [*], Symbios may bill NCR upon notification
        to NCR of its intent to do so, and NCR agrees to pay any such bill,
        which billed amount shall be equal to the full price for such units. NCR
        shall be responsible for shipping charges for the initial shipment out
        and the return shipment associated with all evaluation equipment.

<Table>
<Caption>
          REFURBISHMENT
MODEL #      CHARGE
-------   -------------
<S>       <C>
 [*]           [*]
 [*]           [*]
 [*]           [*]
 [*]           [*]
 [*]           [*]
</Table>

             3.7.2 (The text of Paragraph 3.7.2 of the First Amendment is
        inserted here in its entirety.)

             3.7.3 (The text of Paragraph 3.7.3 of the First Amendment is
        inserted here in its entirety)

     Except as amended by this Second Amendment, all other terms and conditions
of the Agreement and the First Amendment remain the same.

                                        1
<PAGE>

     THE PARTIES HAVE CAUSED THIS SECOND AMENDMENT TO BE EXECUTED BY THEIR
AUTHORIZED REPRESENTATIVES EFFECTIVE AS OF THE SECOND AMENDMENT EFFECTIVE DATE.

<Table>
<S>                                                <C>
NCR CORPORATION                                    SYMBIOS LOGIC INC.
(FORMERLY AT&T GLOBAL INFORMATION
SOLUTIONS COMPANY)

Signed: /s/ JOE JOY                                Signed: /s/ TOM GEORGENS
       -------------------------------------       -------------------------------------

Printed: Joe Joy                                   Printed: Tom Georgens
        ------------------------------------       ------------------------------------

Title: AVP, CSG, SM&L                              Title: VP GM Storage Systems
     ---------------------------------------       ---------------------------------------

Date:                                              Date: 1-14-98
     ---------------------------------------       ---------------------------------------
</Table>

                                        2
<PAGE>

                 THIRD AMENDMENT TO THE OEM PURCHASE AGREEMENT
                    BETWEEN SYMBIOS LOGIC INC. AND AT&T GIS
                            DATED FEBRUARY 15, 1995

     This Third Amendment ("Third Amendment") to the OEM Purchase Agreement
dated February 15, 1995 ("Agreement") between Symbios Logic Inc. ("Symbios") and
AT&T Global Information Solutions Company, now known as NCR Corporation ("NCR"),
as amended by prior amendments executed by the parties, is entered into by the
parties and made effective this 13 day of August, 1997 ("Third Amendment
Effective Date"). Capitalized terms used but not defined herein shall have the
meaning ascribed to the in the Agreement. This Third Amendment shall be
coterminous with the Agreement.

     WHEREAS, Symbios has provided or caused to be provided to NCR through
Symbios' authorized agent(s) the quotation(s) listed below for additional work
not set forth in the Agreement; and

     WHEREAS, NCR desires that Symbios perform such additional work in
accordance with such quotation(s);

     NOW, THEREFORE, the parties agree as follows:

          I. The following quotation(s) attached hereto are hereby incorporated
     into the Agreement by mutual agreement of the parties.

<Table>
<Caption>
QUOTATION NUMBER        SUBJECT
----------------        -------
<S>               <C>
      [*]         NSC Assembly & Test
</Table>

          II. The above listed quotation(s) and all work to be performed and all
     payments to be made thereunder shall be subject to the terms and conditions
     of the Agreement and all prior amendments thereto, except as expressly set
     forth herein or in the quotation(s).

     Except as amended by this Third Amendment, all other terms and conditions
of the Agreement and all prior amendments thereto remain the same.

     THE PARTIES HAVE CAUSED THIS THIRD AMENDMENT TO BE EXECUTED BY THEIR
AUTHORIZED REPRESENTATIVES EFFECTIVE AS OF THE THIRD AMENDMENT EFFECTIVE DATE.

<Table>
<S>                                                <C>
NCR CORPORATION                                    SYMBIOS LOGIC INC.
(FORMERLY AT&T GLOBAL INFORMATION
SOLUTIONS COMPANY)

Signed: /s/ JOE JOY                                Signed: /s/ TOM GEORGENS
       -------------------------------------       -------------------------------------

Printed: Joe Joy                                   Printed: Tom Georgens
        ------------------------------------       ------------------------------------

Title: AVP SM&L                                    Title: Vice President Storage Systems
     ---------------------------------------       ---------------------------------------

Date:                                              Date: 8/19/97
     ---------------------------------------       ---------------------------------------
</Table>

                                        1
<PAGE>

                 FOURTH AMENDMENT TO THE OEM PURCHASE AGREEMENT
                    BETWEEN SYMBIOS LOGIC INC. AND AT&T GIS
                            DATED FEBRUARY 15, 1995

     This Fourth Amendment ("Fourth Amendment") to the OEM Purchase Agreement
dated February 15, 1995 ("Agreement") between Symbios Logic Inc. ("Symbios") and
AT&T Global Information Solutions Company, now known as NCR Corporation ("NCR"),
as amended by prior amendments executed by the parties, is entered into by the
parties and made effective this 13 day of August, 1997 ("Fourth Amendment
Effective Date"). Capitalized terms used but not defined herein shall have the
meaning ascribed to the in the Agreement. This Fourth Amendment shall be
coterminous with the Agreement.

     WHEREAS, Symbios has provided or caused to be provided to NCR through
Symbios' authorized agent(s) the quotation(s) listed below for additional work
not set forth in the Agreement; and

     WHEREAS, NCR desires that Symbios perform such additional work in
accordance with such quotation(s);

     NOW, THEREFORE, the parties agree as follows:

          I. The following quotation(s) attached hereto are hereby incorporated
     into the Agreement by mutual agreement of the parties.

<Table>
<Caption>
QUOTATION NUMBER        SUBJECT
----------------        -------
<S>               <C>
      [*]         Quarray Development
</Table>

          II. The above listed quotation(s) and all work to be performed and all
     payments to be made thereunder shall be subject to the terms and conditions
     of the Agreement and all prior amendments thereto, except as expressly set
     forth herein or in the quotation(s).

     Except as amended by this Fourth Amendment, all other terms and conditions
of the Agreement and all prior amendments thereto remain the same.

     THE PARTIES HAVE CAUSED THIS FOURTH AMENDMENT TO BE EXECUTED BY THEIR
AUTHORIZED REPRESENTATIVES EFFECTIVE AS OF THE FOURTH AMENDMENT EFFECTIVE DATE.

<Table>
<Caption>
NCR CORPORATION
(FORMERLY AT&T GLOBAL INFORMATION
SOLUTIONS COMPANY)                             SYMBIOS LOGIC INC.
<S>                                            <C>
                          Signed: /s/ JOE JOY                       Signed: /s/ TOM GEORGENS
---------------------------------------------  ---------------------------------------------

                             Printed: Joe Joy                          Printed: Tom Georgens
---------------------------------------------  ---------------------------------------------

                             Title: AVP, SM&L          Title: Vice President Storage Systems
---------------------------------------------  ---------------------------------------------

                                       Date:                                   Date: 8/19/97
---------------------------------------------  ---------------------------------------------
</Table>

                                        1
<PAGE>

                 FIFTH AMENDMENT TO THE OEM PURCHASE AGREEMENT
                    BETWEEN SYMBIOS LOGIC INC. AND AT&T GIS
                            DATED FEBRUARY 15, 1995

     This Fifth Amendment ("Fifth Amendment") to the OEM Purchase Agreement
dated February 15, 1995 ("Agreement") between Symbios Logic Inc. now known as
Symbios, Inc. ("Symbios") and AT&T Global Information Solutions Company, now
known as NCR Corporation ("NCR"), as amended by prior amendments executed by the
parties, is entered into by the parties and made effective this   day of
          , 1998 ("Fifth Amendment Effective Date"). Capitalized terms used but
not defined herein shall have the meaning ascribed in the Agreement. This Fifth
Amendment shall be coterminous with the Agreement.

     WHEREAS, Symbios has provided or caused to be provided to NCR through
Symbios' authorized agent the quotation listed below for additional work not set
forth in the Agreement; and

     WHEREAS, NCR desires that Symbios perform such additional work in
accordance with such quotation;

     NOW, THEREFORE, the parties agree as follows:

     1.0 Additional Work

          I. The following quotation attached hereto is hereby incorporated into
     the Agreement by mutual agreement of the parties.

<Table>
<Caption>
QUOTATION NUMBER    SUBJECT
----------------    -------
<C>               <S>
 Dated 2/27/98    SYMplicity(TM)
</Table>

          II. The above listed quotation and all work to be performed and all
     payments to be made thereunder shall be subject to the terms and conditions
     of the Agreement and all prior amendments thereto, except as expressly set
     forth herein or in the quotation.

          III. The SYMplicity(TM) storage manager for Solaris X86, version 6.X,
     will be licensed to NCR in accordance with Section 21 of the Agreement.

          IV. The SYMplicity(TM) storage manager for Solaris X86, version 6.X,
     will be supported by Symbios in accordance with Section 14 of the
     Agreement.

     2.0 Exhibit G -- Equipment Loaner Agreement: The attached Exhibit G is
added in its entirety to the Agreement.

     3.0 Section 12.0, WARRANTY AND PRODUCT LIABILITY, of the Agreement is
hereby amended as follows:

          II. A new Paragraph 12.1.4 is added as follows:

             12.1.4 Virus Warranty for SYMplicity(TM) Storage Manager for
        Solaris X86: During the warranty period set forth in Section 12.1.1,
        Symbios warrants that if Symbios learns or suspects that SYMplicity(TM)
        Storage Manager for Solaris X86 provided by Symbios to NCR in connection
        with this Agreement contains any Virus, Symbios shall immediately notify
        NCR and shall make every reasonable effort to immediately remove the
        Virus and supply a copy of replacement software to NCR. For purposes of
        this warranty, "Virus" shall mean any code, programming instructions or
        set of instructions that is designed to damage, interfere with or
        otherwise adversely affect computer programs, data files or hardware
        without the consent or intent of the user of the Product.

     Except as amended by this Fifth Amendment, all other terms and conditions
of the Agreement and all prior amendments thereto remain the same.

                                        1
<PAGE>

     THE PARTIES HAVE CAUSED THIS FIFTH AMENDMENT TO BE EXECUTED BY THEIR
AUTHORIZED REPRESENTATIVES EFFECTIVE AS OF THE FIFTH AMENDMENT EFFECTIVE DATE.

<Table>
<Caption>
NCR CORPORATION
(FORMERLY AT&T GLOBAL INFORMATION               SYMBIOS, INC.
SOLUTIONS COMPANY)                              (FORMERLY SYMBIOS LOGIC INC.)
<S>                                             <C>

                                     Signed:                                         Signed:
---------------------------------------------   ---------------------------------------------

                       Printed: Frank Harrell                                       Printed:
---------------------------------------------   ---------------------------------------------

                              Title: VP, SM&L                                         Title:
---------------------------------------------   ---------------------------------------------

                                       Date:                                            Date:
---------------------------------------------   ---------------------------------------------
</Table>

                                        2
<PAGE>

                                   EXHIBIT G

                           EQUIPMENT LOANER AGREEMENT

                                      [*]
<PAGE>

                 SIXTH AMENDMENT TO THE OEM PURCHASE AGREEMENT
                    BETWEEN SYMBIOS LOGIC INC. AND AT&T GIS
                            DATED FEBRUARY 15, 1995

     This Sixth Amendment ("Sixth Amendment") to the OEM Purchase Agreement
dated February 15, 1995 ("Agreement") between Symbios Logic Inc. now known as
Symbios, Inc. ("Symbios") and AT&T Global Information Solutions Company, now
known as NCR Corporation ("NCR"), amended by prior amendments executed by the
parties, is entered into by the parties and made effective this 30th day of
June, 1998 ("Sixth Amendment Effective Date"). Capitalized terms used but not
defined herein shall have the same meaning ascribed to in the Agreement. This
Sixth Amendment shall be coterminous with the Agreement.

     The parties agree as follows:

     1.0 AT&T Global Information Solutions has changed its name to NCR
Corporation and Symbios Logic, Inc. has changed its name to Symbios, Inc. The
parties agree that this amendment and any other subsequent amendments to the
Agreement will use these names or such other names the parties may use in the
future.

     2.0 Revise section 21.1 as follows:

          21.0 LICENSE OF SOFTWARE

             21.1 As to software which may be provided under this Agreement
        (either separately or with a Product) and which is not fully licensed to
        NCR pursuant to the Purchase and Sale Agreement or its ancillary
        agreements, patents, copyrights, and other intellectual property rights
        relating to that software) a perpetual, worldwide, non-exclusive,
        non-transferable license to reproduce or distribute, either directly or
        through its replicator, contract manufacturer/computer system OEM
        supplier or distributor, under terms no less stringent than those
        contained in this Agreement, copies of the software in object code
        format only, onto a floppy disk or the hard disk of a system, one copy
        per system, and to distribute such copies to NCR's customers. NCR may
        distribute a pre-installed copy and a copy on removable media for use
        with each system. For purposes of royalty or license fee accounting, the
        pre-installed and the removable copy distributed with a single system
        shall be treated as a single copy. If the software package includes a
        "break the seal" license agreement in the package containing the
        software, NCR may transfer the package to its customer without altering
        the package or its contents and the license agreement will be between
        Seller and the customer. If the software does not contain a "break the
        seal" license agreement or if NCR opens the package for installation of
        the software prior to resale, NCR will license the software to its
        Customers pursuant to its standard terms and conditions. NCR shall pay
        to Symbios a royalty for each copy of the software distributed by NCR to
        its customers hereunder.

     3.0 Section 12.0, WARRANTY AND PRODUCT LIABILITY, of the Agreement is
hereby amended as follows:

          I. Revised Section 12.1.4 as follows:

             12.1.4 Virus Warranty for Software Products:  During the warranty
        period set forth in Section 12.1.1, Symbios warrants that if Symbios
        learns or suspects that Software Products provided by Symbios to NCR in
        connection with this Agreement contains any Virus, Symbios shall
        immediately notify NCR and shall make every reasonable effort to
        immediately remove the Virus and supply a copy of replacement software
        to NCR. For purposes of this warranty, "Virus" shall mean any code,
        programming instructions or set of instructions that is designed to
        damage, interfere with or otherwise adversely affect computer programs,
        data files or hardware without the consent or intent of the user of the
        Product.

                                        1
<PAGE>

          II. A new Paragraph 12.1.5 is added as follows:

             12.1.5 Year 2000 Warranty for Y2K-Compliant Software Products:  For
        the period commencing on the Sixth Amendment Effective Date and ending
        on the 31st day of January, 2001, Symbios warrants that the Symbios
        Year-2000 compliant Products listed in the attachment to this Sixth
        Amendment (Attachment A), shall accurately process date/time data
        (including but not limited to calculating, comparing, and sequencing)
        from, into and between the twentieth century and the twenty-first
        century, and the years 1999 and 2000 and leap year calculations and that
        the Symbios Year-2000 compliant Products will, when used in combination
        with other data processing technology, accurately process date/time data
        if the other information technology properly exchanges date/time data
        with it. Upon receipt of written notification from NCR of any
        non-compliance with this warranty, Symbios shall make every reasonable
        effort to immediately correct the non-compliance and supply a copy of
        replacement software to NCR.

     4.0 Section 4.0, PRICES, of the Agreement is hereby amended as follows:

          A new Paragraph 4.5 is added as follows: 4.5 SOFTWARE PRICE CHANGES

          Symbios may not change the prices for any Software product listed in
     Attachment B of this amendment under this Agreement any time during the
     first calendar year after Symbios' first shipment to NCR. After the first
     year Symbios may notify NCR of Software price changes and the basis for
     such changes. NCR shall commence paying new prices effective [*] after
     Symbios' written notice of Software price change, unless otherwise agreed
     to by the parties. Thereafter Symbios may exercise its rights under this
     Section 4.0 (Prices) with regard to price changes for Software.

     Except as amended by this Sixth Amendment, all other terms and conditions
of the Agreement and all prior amendments thereto remain the same.

     THE PARTIES HAVE CAUSED THIS SIXTH AMENDMENT TO BE EXECUTED BY THEIR
AUTHORIZED REPRESENTATIVES EFFECTIVE AS OF THE SIXTH AMENDMENT EFFECTIVE DATE.

<Table>
<S>                                             <C>
NCR CORPORATION                                 SYMBIOS, INC.
Signed:                                         Signed: /s/ Tom Georgens
--------------------------------------------    --------------------------------------------
Printed: Frank Harrell                          Printed: Tom Georgens
--------------------------------------------    --------------------------------------------
Title: VP SM&L                                  Title: VP & General Manager, Symbios Storage
--------------------------------------------    Systems
Date:                                           --------------------------------------------
--------------------------------------------    Date: 7/6/98
                                                --------------------------------------------
</Table>

                                        2
<PAGE>

                                  ATTACHMENT A

                   SYMBIOS LOGIC YEAR 2000-COMPLIANT PRODUCTS

     1. Raid Manager 5.02.03 or later

     2. SYMplicity(TM) Storage Manager 6.20 or later

     3. Series 3/Series 4 RAID controllers application firmware, 2.01 or later

     4. Series 3/Series 4 RAID controllers boot firmware versions 2.01, 2.02,
        2.03.04 or later, 2.04, 2.05 or later

     5. SYMplicity(TM) Storage Manager for Solaris X86, version 6.01.XX or later
<PAGE>

                                  ATTACHMENT B

Software Products:

Raid Manager for UNIX MP RAS Version 5.05

SYMplicity Storage Manager for Solaris X86 Version 6.01.XX

SYMplicity Storage Manager for NT Version 6.20.XX
<PAGE>

                SEVENTH AMENDMENT TO THE OEM PURCHASE AGREEMENT
                    BETWEEN SYMBIOS LOGIC INC. AND AT&T GIS
                            DATED FEBRUARY 15, 1995

     This Seventh Amendment ("Seventh Amendment") to the OEM Purchase Agreement
dated February 15, 1995 (Agreement") between Symbios Logic Inc. now known as
Symbios, Inc. ("Symbios") and AT&T Global Information Solutions Company, now
known as NCR Corporation ("NCR"), amended by prior amendments executed by the
parties, is entered into by the parties and made effective this      day of
          , 1998 ("Seventh Amendment Effective Date"). Capitalized terms used
but not defined herein shall have the meaning ascribed in this Agreement. This
Seventh Amendment shall be coterminous with the Agreement.

     WHEREAS, the parties desire NCR to loan equipment to Symbios in support of
Symbios' testing and certification of the NCR 6288 QuArray disk array for the
NCR Eclipse platform; and

     WHEREAS, NCR and Symbios desire to amend and addend the Agreement to add
the new list of supporting equipment to "Exhibit G: Equipment Loaner Agreement"
of the Fifth Amendment to this OEM Purchase Agreement ("Fifth Amendment");

     NOW, THEREFORE, the parties agree as follows:

          1.0 Add "Attachment 1A to Loaner Agreement" in its entirety, attached
     hereto, to the Fifth Amendment's Exhibit G: Equipment Loaner Agreement.

          3.0 Throughout the Agreement, references to Attachment 1 to Loaner
     Agreement, will refer equally to the added Attachment 1A.

     Except as amended by this Seventh Amendment, all other terms and conditions
of the Agreement and all prior amendments thereto remain the same.

     THE PARTIES HAVE CAUSED THIS SEVENTH AMENDMENT TO BE EXECUTED BY THEIR
AUTHORIZED REPRESENTATIVES EFFECTIVE AS OF THE SEVENTH AMENDMENT EFFECTIVE DATE.

<Table>
<S>                                                <C>
NCR CORPORATION                                    SYMBIOS, INC.
(FORMERLY AT&T GLOBAL                              (FORMERLY SYMBIOS LOGIC, INC.)
INFORMATION SOLUTIONS COMPANY)

         Signed: /s/ FRANK HARRELL
--------------------------------------------       Signed:
                                                           ------------------------------------
           Printed: Frank Harrell
--------------------------------------------       Printed:
                                                           ------------------------------------
               Title: VP SM&L
--------------------------------------------       Title:
                                                         --------------------------------------
               Date: 11/17/98
--------------------------------------------       Date:
                                                         --------------------------------------
</Table>

                                        1
<PAGE>

             ATTACHMENT 1C TO EQUIPMENT LOANER AGREEMENT EXHIBIT G1

                                 (AMENDMENT #5)

                                      [*]
<PAGE>

            ATTACHMENT A-1 TO EQUIPMENT LOANER AGREEMENT EXHIBIT G1

                                 (AMENDMENT #8)

                                      [*]
<PAGE>

             ATTACHMENT 1B TO EQUIPMENT LOANER AGREEMENT EXHIBIT G1

                             EQUIPMENT DESCRIPTION

     The following is a part of the Loaner Agreement by and between NCR
Corporation and Symbios Inc.

     The hardware/software configurations to be supplied by NCR to you are as
follows:

     Hardware Description (include memory & peripherals)

     [*]

     Software Description (include OS & applications)

     [*]

     Documentation

     NONE
<PAGE>

                 EIGHTH AMENDMENT TO THE OEM PURCHASE AGREEMENT
                    BETWEEN SYMBIOS LOGIC INC. AND AT&T GIS
                            DATED FEBRUARY 15, 1995

     This Eighth Amendment ("Eighth Amendment") to the OEM Purchase Agreement
dated February 15, 1995 ("Agreement") between Symbios Logic Inc., now known as
LSI Logic Storage Systems, Inc. ("Symbios"), and AT&T Global Information
Solutions Company, now known as NCR Corporation ("NCR"), amended by prior
amendments executed by the parties, is entered into by the parties and made
effective the 15th day of December, 1998 ("Eighth Amendment Effective Date").
Capitalized terms used but not defined herein shall have the meaning ascribed in
the Agreement. This Eighth Amendment shall be coterminous with the Agreement.

     WHEREAS, the parties desire NCR to loan equipment to Symbios in support of
Symbios' testing and certification of the [*]; and

     WHEREAS, NCR and Symbios desire to amend and addend the Agreement to add
the new list of supporting equipment to "Exhibit G: Equipment Loaner Agreement"
of the Fifth Amendment to this OEM Purchase Agreement ("Fifth Amendment");

     NOW, THEREFORE, the parties agree as follows:

          1.0 Add "Attachment 1B to Loaner Agreement" in its entirety, attached
     hereto, to the Fifth Amendment's Exhibit G: Equipment Loaner Agreement.

          2.0 Term of Use. The term of use of the Equipment will be effective as
     of the Eighth Amendment Effective Date and will terminate [*] from the
     Effective Date, unless NCR earlier terminates or extends such dates.

          3.0 Location of Equipment. The Equipment will be located at your
     facility at:
              LSI Logic Storage Systems, Inc.
              4420 Arrows West Parkway
              Colorado Springs, CO 80907-3444

          4.0 Throughout the Agreement, references to Attachment 1 to Loaner
     Agreement, will refer equally to the added Attachment 1B.

     Except as amended by this Eighth Amendment, all other terms and conditions
of the Agreement and all prior amendments thereto remain the same.

     THE PARTIES HAVE CAUSED THIS EIGHTH AMENDMENT TO BE EXECUTED BY THEIR
AUTHORIZED REPRESENTATIVES EFFECTIVE AS OF THE EIGHTH AMENDMENT EFFECTIVE DATE.

<Table>
<S>                                                <C>
NCR CORPORATION                                    LSI LOGIC STORAGE SYSTEMS, INC.
(FORMERLY AT&T GLOBAL                              (FORMERLY SYMBIOS LOGIC, INC.)
INFORMATION SOLUTIONS COMPANY)
         Signed: /s/ FRANK HARRELL                           Signed: /s/ BILL WUERTZ
--------------------------------------------       --------------------------------------------
           Printed: Frank Harrell                              Printed: Bill Wuertz
--------------------------------------------       --------------------------------------------
               Title: VP SM&L                         Title: VP & GM, Storage Components Div
--------------------------------------------       --------------------------------------------
               Date: 12/20/98                                     Date: 12/22/98
--------------------------------------------       --------------------------------------------
</Table>

                                        1
<PAGE>

             ATTACHMENT 1B TO EQUIPMENT LOANER AGREEMENT EXHIBIT G1

                             EQUIPMENT DESCRIPTION

                                      [*]
<PAGE>

             ATTACHMENT 1A TO LOANER EXHIBIT G1 TO LOANER AGREEMENT
                              TO LOANER AGREEMENT

                             EQUIPMENT DESCRIPTION

                                      [*]
<PAGE>

                 NINTH AMENDMENT TO THE OEM PURCHASE AGREEMENT
                    BETWEEN SYMBIOS LOGIC INC. AND AT&T GIS
                            DATED FEBRUARY 19, 1995,

     This Ninth Amendment ("Ninth Amendment") to the OEM Purchase Agreement
dated February 15, 1995 ("Agreement") between Symbios Logic Inc., now known as
LSI Logic Storage Systems, Inc. ("LSI"), and AT&T Global Information Solutions
Company, now known as NCR Corporation ("NCR"), amended by prior amendments
executed by the parties, is entered into by the parties and made effective the
27th day of March, 2000 ("Ninth Amendment Effective Date"). Capitalized terms
used but not defined herein shall have the meaning ascribed in the Agreement.
This Ninth Amendment shall be coterminous with the Agreement.

     WHEREAS, the parties desire NCR to loan equipment to LSI in support of
LSI's testing and certification [*]; and

     WHEREAS, NCR and LSI desire to amend and addend the Agreement to add this
new list of supporting equipment to "Exhibit G: Equipment Loaner Agreement" of
the Fifth Amendment to this OEM Purchase Agreement ("Fifth Amendment");

     WHEREAS, the parties desire LSI to loan equipment to NCR in support of
NCR's testing and certification of new [*] for NCR disk arrays supplied by LSI;
and

     WHEREAS, NCR and LSI desire to amend and addend the Agreement to add this
new list of supporting equipment to "Attachment A: Symbios, Inc. Equipment Loan
Agreement" of the Eighth Amendment to this OEM Purchase Agreement ("Eighth
Amendment");

     NOW, THEREFORE, the parties agree as follows:

          1.0 For the loan of equipment by NCR to LSI, add "Attachment 1C to
     Loaner Agreement" in its entirety, as attached hereto, to the Fifth
     Amendment's Exhibit G: Equipment Loaner Agreement.

          1.1 Term of Use. The term of use of the Equipment will be effective as
     of the Ninth Amendment Effective Date and will terminate [*] from the
     Effective Date, unless NCR earlier terminates or extends such dates.

          1.2 Location of Equipment. The Equipment will be located at LSI's
     facility at:

              LSI Logic Storage Systems, Inc.
              3718 North Rock Rd.
              Wichita, KS 67226

          1.3 Throughout the Agreement, references to Attachment 1 to Loaner
     Agreement, will refer equally to the added Attachment 1C.

          2.0 For the loan of equipment by LSI to NCR, add "Attachment A-1 to
     Symbios, Inc. Equipment Loan Agreement", as attached hereto, to the Eighth
     Amendment.

          2.1 Term of Use. The term of use of the Equipment will be effective as
     of the Ninth Amendment Effective Date and will terminate [*], unless LSI
     earlier terminates or extends such dates.

          2.2 Location of Equipment. The Equipment will be located at NCR's
     facility at:

              NCR Corporation
              17095 Via del Campo
              San Diego, CA 92127

          2.3 Throughout the Agreement, references to Attachment A to Loaner
     Agreement, will refer equally to the added Attachment A-1.

     Except as amended by this Ninth Amendment, all other terms and conditions
of the Agreement and all prior amendments thereto remain the same.

                                        1
<PAGE>

     THE PARTIES HAVE CAUSED THIS NINTH AMENDMENT TO BE EXECUTED BY THEIR
AUTHORIZED REPRESENTATIVES EFFECTIVE AS OF THE NINTH AMENDMENT EFFECTIVE DATE.

<Table>
<S>                                             <C>
NCR CORPORATION                                 LSI LOGIC STORAGE SYSTEMS, INC.
(formerly AT&T Global                           (formerly Symbios, Inc.)
Information Solutions Company)

           Signed: /s/ ALAN CHOW                Signed:
--------------------------------------------            ------------------------------------

Printed: Alan Chow, VP & GM                     Printed:
        ------------------------------------    ------------------------------------

Title: Teradata Development Division            Title:
      --------------------------------------    --------------------------------------

Date: 4/3/00                                    Date:
      --------------------------------------    --------------------------------------
</Table>

                                        2
<PAGE>

          TENTH AMENDMENT TO THE OEM PURCHASE AGREEMENT ("AGREEMENT")
              BETWEEN LSI LOGIC STORAGE SYSTEMS, INC. ("LSI") AND
                   NCR CORPORATION, ("NCR") FORMERLY AT&T GIS

     This Tenth Amendment ("Tenth Amendment") to the OEM Purchase Agreement
dated February 15, 1995 ("Agreement") between Symbios Logic Inc., now known as
LSI Logic Storage Systems, Inc. ("LSI"), and AT&T Global Information Solutions
Company, now known as NCR Corporation ("NCR"), amended by prior amendments
executed by the parties, is entered into by the parties and made effective
September 17, 2001 ("Tenth Amendment ("Effective Date"). Capitalized terms used
but not defined herein shall have the meaning ascribed in the Agreement. This
Tenth Amendment shall be coterminous with the Agreement.

     1.0 Scope

     Unless otherwise specified, all defined terms in the OEM Agreement shall
have the same meaning when used in this Tenth Amendment. NCR will act as the
primary point of contact for all NCR customers experiencing product problems.
LSI plays a key role in enabling NCR to support its Customers. This Tenth
Amendment details LSI's responsibilities with respect to that support.

     2.0 Technical Information

          2.1 To the extent available now, and during the life of this
     Agreement, LSI shall provide the following, collectively referred to as
     "Technical Information," [*]:

          2.1.1 Problem History Database.  A regularly updated problem history
     database of problems that have been called into this group that include a
     mutually agreed upon list of items.

          2.1.2 Documentation.  All information necessary to install, diagnose,
     repair and maintain the Product, such as User, Operator, Diagnostic,
     Service and Systems administrator manuals; Service test procedures; List of
     any special hardware tools and service hardware test equipment used; Site
     preparation and installation specifications; and related documentation for
     the purpose of problem identification and resolution; Technical bulletins;
     Engineering change orders; Software updates; Bulletin board access and web
     site access; Other relevant materials. Engineering drawings and schematics;
     Logic and timing diagrams; Software source code will be made available if
     Products are discontinued or when mutually agreed that a customer
     requirement necessitates further engineering analysis.

          2.2 Documentation will be in an electronic format suitable for both
     reproduction and for publishing on NCR's Corporate Intranet, and will be
     updated by new Documentation from time-to-time as it becomes available [*].
     Documentation currently available will be provided to NCR as soon as
     practicable, but not more than [*] following the signing of this Agreement.
     New Product Documentation will be provided to NCR no later than [*] prior
     to Product shipment to the NCR Customer.

          2.3 NCR will have the right to copy, modify and use, and have copied,
     modified and used, the Documentation provided by LSI for the purpose of
     providing desired manuals, training or support materials or the like
     concerning the Product(s), provided that any LSI copyrights therein are
     appropriately safeguarded. Such manuals, training or support materials are
     to be used solely to support the Product(s). LSI shall include with each
     unit of Product purchased a complete set of Documentation agreed upon by
     NCR and LSI relating to the operation and/or maintenance thereof as is
     customarily supplied to end users.

     3.0 Technical Support

          3.1 General Description.  NCR shall attempt to resolve Customer
     problems independently using the training and information provided by LSI.
     If a greater level of technical expertise is required, NCR will engage LSI
     in resolving the Customer's problem and will be the interface to the
     customer throughout the problem resolution process. NCR will assign the
     problem priority as detailed in Attachment 1 to this Exhibit and provide
     LSI with a unique reference number. LSI shall use the same reference number
     when communicating with NCR. NCR will provide LSI with all information
     relevant to the problem,

                                        1
<PAGE>

     including, if applicable, the method used by NCR to duplicate the problem
     on its own systems. NCR will convey such information to LSI by whatever
     means both parties agree are most expedient. LSI shall make available via
     telephone or other appropriate means of communication 7 days per week, 24
     hours per day, 365 days per year individuals sufficiently skilled to assist
     NCR in problem resolution. If necessary, LSI's technical representative
     shall be available to provide on-site support at Customer's location. LSI
     agrees that LSI Technical Support shall be provided at an agreed upon
     Technical Support charge and stated in Exhibit B. If LSI fails to meet
     agreed upon performance metrics (shown in Section 4.8.3) or the Product
     quality falls below product specifications, NCR has the right to readdress
     the LSI Technical Support charge.

          3.2 Levels of Support -- NCR shall provide Level l and Level 2
     support. LSI agrees to provide Level 3 support on an as-required basis.

             3.2.1 Level 1 -- Call acceptance and ownership until resolution.
        Gather problem information and determine criticality. Search knowledge
        base and deliver known solutions to Customer. Dispatch NCR Customer
        Engineer as appropriate. Escalate to Level 2 support as required.

             3.2.2 Level 2 -- Respond to Level 1 escalations with a higher level
        of expertise in a specific technology area. Develop and gain customer
        agreement for problem isolation, solution creation and solution
        implementation plan. Provide an existing fix, work-around solution, or
        escalate to LSI for assistance. Coordinate LSI's response.

             3.2.3 Level 3 -- Assign resources as required to resolve problem in
        accordance with Attachment 1 and Section 3.3 below. Work with NCR Level
        2 support to coordinate the development and delivery of problem
        solutions.

          3.3 Response, Update and Resolution Guidelines -- When LSI has been
     engaged by NCR in problem resolution, LSI will use commercially reasonable
     efforts to comply with the guidelines specified in Attachment 1 enabling
     NCR to meet commitments to its customers.

             3.3.1 Time frame measurements specified in Attachment 1 begin when
        LSI is first contacted by NCR. Problem resolution is considered complete
        when LSI communicates a recommended problem solution to NCR and NCR
        verifies successful implementation of the recommended solution with the
        NCR customer, Account Team, or field support representative.

             3.3.2 After hour support requests by NCR will be limited to
        Priority One and Priority Two customer calls unless otherwise mutually
        agreed upon by NCR and LSI. LSI's product specialist shall be available
        via telephone to enable an expected engagement [*].

             3.3.3 Both NCR and LSI support organizations agree to log all
        reported customer problems into their respective problem resolution
        tracking systems. Incidents logged, and their associated documented
        activities in each party's problem tracking system, for the same
        reported customer problem, will be tracked manually between the parties
        (phone, Fax, etc.) until such time as NCR and LSI can interface
        electronically into each other's problem tracking system. NCR and LSI
        will work towards implementing this systems interface within [*], but
        not more than [*], of this Tenth Amendment implementation.

          3.4 LSI Logic Point(s) of Contact.  LSI's point(s) of contact for
     Technical Support shall be provided to NCR as soon as practicable, but not
     more than [*] following the signing of the Tenth Amendment.

          3.5 Continuing Availability.  LSI's Technical Support as described in
     this Section 3 shall be available to NCR during the term of the Agreement
     and for [*].

          3.6 Reporting.  LSI shall provide NCR with a [*] report which details
     LSI's performance relative to the Response and Resolution Guidelines
     specified in this Section 3 and Attachment 1. At a minimum, the report will
     include a complete list of problems escalated to LSI, the time and date
     each call was

                                        2
<PAGE>

     received, a brief description of each problem, its Priority Level, the time
     between LSI's call receipt and initial response, problem status, and if
     resolved, the date and time of closure.

     4.0 Parts

          4.1 Identification.  A complete Parts list will be provided to NCR at
     least [*] prior to the delivery of the first new Product of each type
     ordered by NCR. LSI will use best efforts to provide a [*] leadtime on
     emergency changes. LSI shall provide a recommended spare Parts list
     designating those Parts (and quantities) which are recommended for spare
     Parts and those parts that are not. NCR may add components to the
     recommended spare parts list. NCR will define the subassembly level of
     orderable spare Parts. LSI shall provide a translation table relating the
     LSI Part to NCR Part number for each Product. This list shall include the
     prime and all family members of all part and products.

          4.2 Availability.  LSI shall make available to NCR such Parts as NCR
     may require for all Products purchased by NCR from LSI for a period of not
     less than [*]. LSI shall notify NCR in writing at least [*] for integrated
     controllers and [*] for subsystems and other parts prior to discontinuing
     the availability of these Parts during and after this period. NCR may then
     buy, and LSI shall provide, such quantities as NCR deems necessary to
     fulfill its Product support requirements.

          4.3 First Article Inspection.

             4.3.1 All initial purchases of a particular type of Part or Product
        from LSI shall be subject to first article inspection by NCR at NCR
        Peachtree City-Parts Distribution and Repair Center (PDRC).

             4.3.2 A minimum of [*] is required for proper evaluation of product
        during the first article inspection process. If the initial order
        quantity is [*], future Orders will be subject to first article
        inspection until the minimum quantity requirement has been successfully
        met.

             4.3.3 First article inspection is based on the Part or Product's
        conformance to functional specifications, engineering drawings,
        procurement specifications, NCR standards for workmanship, Electro
        Static Discharge, packaging, and the NCR Supplier Guide, as long as it
        does not conflict with the original Statement of Work. Any rejected
        product will be returned for corrective action at the expense of the LSI
        pursuant to the OEM Agreement.

          4.4 Lead Time.  Lead Time for RAID Products, all other current
     products, and Parts are provided in the OEM Agreement and within Amendment
     One to the OEM Agreement. Lead time will be measured from receipt of NCR's
     purchase order to availability for shipment.

          4.5 Emergency Orders.  LSI shall accept Emergency Orders from NCR
     seven (7) days a week, twenty-four (24) hours per day, three hundred sixty
     five (365) days per year for all Parts. LSI shall fill all Emergency Orders
     at an agreed to charge as specified in Exhibit B. LSI shall use best
     efforts, including taking material from production or from other customers'
     non-Emergency orders, to make the Part available for shipment within [*]
     following receipt of the Emergency Order. LSI shall provide waybill
     information to NCR no later than [*]. LSI's point(s) of contact for
     Emergency Orders and point(s) of contact for escalation of problems
     associated with Emergency Orders will be provided to NCR as soon as
     practicable, but not more than [*] following the signing of this Agreement.

          4.6 Reworkable Parts.  "Reworkable Parts" are Parts that have failed,
     but may be reworked to perform in accordance with their Specifications. LSI
     shall repair and restore defective Parts and/or Products (including the
     cosmetic appearance) to a like-new condition. A like-new condition means
     the Part or Product will be repaired to meet the latest OEM specifications
     and/or revision levels and the requirements of this Agreement, including
     but not limited to, performance, reliability, and life expectancy. LSI
     shall restore the Parts or Products to normal operating condition by
     readjustments and/or material replacement of components. NCR will assist
     the LSI with part number specification due to board revisions.

                                        3
<PAGE>

             4.6.1 Upon receipt of Reworkable Parts, LSI Logic shall rework the
        part within a lead time of [*] (measured from receipt of the defective
        part by LSI to shipment of the repaired part to NCR) and return the part
        to NCR.

             4.6.2 Reworkable Parts no longer under warranty at the time of
        failure may be returned to LSI for repair at the identified rework price
        provided by LSI as outlined in Exhibit B of the Agreement; however, NCR
        reserves the right to choose an alternate repair Supplier as mutually
        agreed to on a case by case basis. Upon receipt of Reworkable Parts, LSI
        shall rework the part and return it to NCR within the lead time
        specified in Section 4.6.1. LSI's location(s) for receipt of Reworkable
        Parts shall be provided to NCR as soon as practicable, but not more than
        [*] following the signing of the Agreement.

             4.6.3 LSI shall attach a rework label to each reworked Product or
        Part returned to NCR in accordance with the NCR Supplier Guide. The
        rework label provides a repair status and a new label will be used each
        time a Product or Part is repaired. All previous rework labels shall
        remain on the Product or Part.

             4.6.4 If LSI determines the Part or Product is non-repairable, LSI
        shall contact the NCR Buyer listed on the Purchase Order for disposition
        instructions. Decisions to scrap NCR property will be solely that of NCR
        and will not be independently made by LSI without consultation with NCR.
        Material will be returned to NCR freight collect within [*] to NCR of
        non-repairable.

             4.6.5 LSI shall notify NCR in writing at least [*] prior to
        discontinuing repair services for any Part or Product. LSI shall provide
        to NCR applicable Engineering drawings, Product specifications, and all
        other information relevant to the manufacturing and repair of the
        Product that will allow NCR to identify the Product and repair
        requirements to an alternate repair source.

             4.6.6 LSI agrees that Parts and packaging will be in clean,
        like-new condition, and are subject to the same cosmetic, quality and
        acceptance criteria under the Agreement as new Products and Parts. LSI
        shall package parts individually in a protective package that is
        suitable for individual distribution, and which includes a label
        identifying both the LSI and NCR part number. Each shipment will have
        its own packing list that will identify the NCR part numbers and
        purchase order numbers included. Any exception must be negotiated with
        NCR. If displays or monitors are reworked, phosphor burns are not
        allowed anywhere on the CRT. No bends or twists in metal frames,
        brackets, enclosures, etc. are allowed. NCR will provide workmanship
        standards for cosmetic details and standards concerning acceptable
        defects on printed circuit boards upon request.

             4.6.7 LSI will provide NCR with a [*] repair activity report
        containing the following information:

               1. NCR Part Number

               2. Description

               3. Serial Number

               4. Warranty Status

               5. NFF Status

               6. Repair Action Description

               7. Repair Price

               8. NFF Price

               9. Purchase Order Number

             4.6.8 Inspection of Repair Services.  If any repair services do not
        conform to the requirements of this Agreement, NCR may require LSI to
        perform the repairs again to conform with the requirements, at no
        additional cost to NCR. LSI shall provide a Return Material
        Authorization
                                        4
<PAGE>

        (RMA) number within [*] of NCR's request for a RMA enabling NCR to
        return non-conforming Parts or Products. If defects in services cannot
        be corrected by re-performance, NCR may:

                4.6.8.1 Require LSI to take necessary action to ensure that
           future performance conforms to requirements; and

                4.6.8.2 Reduce the purchase order price to reflect the reduced
           value of the Services performed.

             4.6.9 Any shipment of non-complying Products or Parts by NCR to LSI
        and the return shipment of repaired or replacement Products or Parts by
        LSI to NCR will be at LSI's expense.

             4.6.10 Title and Risk of Loss.  NCR shall retain title to all its
        property furnished to LSI for repair under this Agreement. LSI assumes
        the risk of, and shall be responsible for, any loss, destruction of, or
        damage to NCR property upon its delivery to LSI, and such risk shall
        remain with LSI until the repaired Parts and/or Products are delivered
        to NCR's designated carrier.

          4.7  Ordering and Invoicing.  NCR's Worldwide Service Logistics
     ("WSL") organization prefers to use EDI or other electronic methods for
     ordering and invoicing. LSI agrees to cooperate with NCR in establishing
     electronic ordering and invoicing processes, and to obtain and operate such
     hardware and software as is reasonably required to implement such
     processes. The terms of payment for all invoices is net [*] predicated on
     WSL previously receiving a defect free shipment. All properly matched
     invoices are paid by check in US Dollars.

        Where EDI transactions are not used, all invoices must be mailed to:

        NCR Corporation
        P.O. Box 2205
        Peachtree City, GA 30269
        Attention: Finance Department

     LSI may obtain additional information about an invoice by contacting the
NCR WSL buyer or purchasing manager. LSI agrees to participate in [*] telephone
calls with NCR to reconcile open invoice and purchase order issues.

          4.8 LSI Performance Evaluation.

             4.8.1 The LSI Performance Evaluation shall be performed [*] by NCR
        to review and evaluate LSI performance pursuant to technical compliance,
        on-time delivery, quality level, purchase price variance, and overall
        responsiveness to contractual requirements. The primary vehicle for
        evaluating LSI performance will be the LSI Scorecard.

             4.8.2 The LSI Performance Evaluation will measure delivery and
        conformance for general purchases and rework. Delivery performance will
        be measured by comparing the number of days late or early against the
        contract ship date. NCR will rate LSI Out-of-Box failure ("OBF")
        performance as a critical component in LSI Logic's performance. NCR will
        monitor LSI performance during the warranty period as a major component
        in overall LSI performance. Spare Part receipt conformance (packaging,
        labeling, etc.) will be measured against the requirements contained in
        the NCR Supplier Guide.

             4.8.3 At a minimum, the following shall be part of the [*] LSI
        scorecard review:

               - [*]

             4.8.4 All formal and informal reviews shall be documented by NCR
        and LSI to include all action plans and action items.

                                        5
<PAGE>

     5.0 Closed Loop Corrective Actions

          5.1 LSI must have a documented quality policy identifying a complete
     close loop corrective action (CLCA) procedure, which is comprised of the
     following elements: Problem Identification, Determination of Root Cause,
     Timely and Effective Corrective Action, and Verification of Corrective
     Action.

          5.2 NCR shall have the option of returning all failures for full,
     root-cause, corrective action Failure Analysis by LSI. At NCR's discretion,
     failures will be routed for analysis and return, or analysis and repair.
     LSI shall provide a Return Material Authorization (RMA) number within [*]
     of NCR's request for an RMA. NCR must provide the Part serial number and
     failure data. LSI shall maintain equipment and personnel to provide prompt
     and accurate failure analysis or standard repair on all Parts and Products
     covered by this agreement.

          5.3 Detailed failure analysis data and recommended corrective action
     measures shall be provided to NCR upon completion of all failure analysis
     actions.

             5.3.1 For non-critical Failure Analysis requirements, LSI shall
        conduct Failure Analysis and report the final Failure Analysis results
        to NCR within [*] from receipt of the product.

             5.3.2 For mutually agreed upon critical Failure Analysis
        requirements (e.g. data corruption/data integrity issues), LSI shall
        perform and report final Failure Analysis results within [*] and conform
        to the times specified below for LSI's Closed Loop Corrective Action
        process from receipt of a failed Product or Part. LSI shall communicate
        the results of each step of the process to NCR.

               - [*]

     6.0 Packaging, Shipping, and Transportation

          6.1 Specific packaging, shipping, and transportation requirements and
     information are provided in the NCR Supplier Guide.

          6.2 The shipping method of purchased items shall be determined by NCR.
     An NCR designated carrier shall make all shipments. NCR will monitor
     compliance with shipments via NCR designated carriers. If shipments are
     made to NCR via non-approved carriers without prior coordination with NCR,
     LSI shall pay to NCR the difference in shipping charges between shipment
     via the NCR designated carrier and the carrier used. NCR will report and
     bill for shipping non-compliance on a quarterly basis.

     7.0 NCR Supplier Guide

          7.1 Details of NCR operational procedures related to Parts ordering,
     labeling, packaging, shipping, and transportation are available in the NCR
     Supplier Guide. LSI may request the Supplier Guide on 3.5 inch diskette
     (Microsoft Word format) or in hard (paper) copy.

          7.2 The Supplier Guide is available for current and potential NCR
     Service Parts Suppliers. The Supplier Guide contains guidelines that the
     Supplier shall follow to be considered as a business partner with NCR.

          7.3 LSI shall immediately notify NCR if it is unable to comply with
     any provision of the Supplier Guide prior to signing the Agreement.

     8.0 Product Changes

     Change Notification

     LSI shall send notification for changes that affect form, fit, or function
of hardware, software, firmware, diagnostics and documentation changes.

     Any notice of change from LSI must include at a minimum the following:

     - Reason for change (e.g., availability of a part, cost reduction, etc.) If
       fix, describe symptom: i.e., operator message, error code, customer
       impact, etc.

                                        6
<PAGE>

     - Desired date of manufacturing incorporation

     - Difference between the old and new

     - New Part MTBF, if applicable

     - Results of testing that support same or better resulting performance

     - Means of differentiating Products or Parts by identification number
       change, revision level change, or by some other means so, that NCR can
       discern the difference in parts, SW/FW packages, and documentation.

     - Hardware stock disposition

     - Interchangeability and migration restrictions

     - Hardware rework instructions, if applicable

     Delivery of Change Notification

     LSI will provide the appropriate change notification to a designated
primary point of contact and one designated alternate point of contact within
NCR at the following address:

        NCR Corporation
        17095 Via del Campo
        San Diego, CA 92127

     Sending Change Notifications

     LSI shall send the change notifications to NCR via US mail or e-mail
(preferred), and the NCR contact person shall immediately acknowledge receipt by
sending an email to the LSI contact person. LSI shall issue change notices at
least [*] before the change is to be implemented, except in cases of emergency.

          8.1 Interchangeability.  If any change to Products or Parts affects
     the interchangeability of the latest version and previous version Part, LSI
     shall provide a different Part number for the latest version Parts. LSI
     shall indicate whether each previous version is interchangeable with the
     latest version and whether the latest version is interchangeable with each
     previous version. LSI shall identify by tracer or serial number and NCR
     part number those Products requiring the newer version Part. LSI shall
     continue to make available, for the time period specified in Section 4.3 of
     this Tenth Amendment, Parts which are identical to or two-way
     interchangeable with the previous version.

          8.2 Software Fixes and Updates.  Fixes are bug fixes, critical
     patches, modified documentation or other changes intended to correct
     feature/function deficiencies in the Product. Updates are changes to the
     Product which incorporate accumulated Fixes and new features into the
     then-current version of the Product. Version Changes are new releases to
     the software and/or firmware which incorporate fixes and well as new
     features and enhancements. Major Releases have substantially different
     software and firmware features. Major Releases will be signified by a
     change to the release version in the most significant digit (6.22 versus
     7.0.1), while a Version change will have a part number change to a lesser
     significant digit (6.22 versus 6.23).

          8.3 LSI hereby grants to NCR a [*], non-exclusive, worldwide license
     to reproduce, use and distribute Fixes and Updates to affected Customers.
     NCR will not knowingly provide such Fixes and Updates to Customers who have
     not licensed the corresponding Product. All copies made by NCR will contain
     any copyright, trademark, disclaimer or patent notices that appear on or in
     the original provided by LSI.

          8.4 Software Version Changes.  If a Version change to the Product
     addresses an identified Customer problem that has not been previously
     resolved by a Fix or Update, LSI shall, provide NCR with the new Version of
     the Product to affected customers. LSI hereby grants to NCR a [*], non-
     exclusive, worldwide, license to reproduce, use and distribute the new
     Version to Customers. NCR will not knowingly provide the new Version to
     Customers who have not licensed the corresponding Product.

                                        7
<PAGE>

     All copies will contain any copyright, trademark, disclaimer or patent
     notices that appear on or in the original provided by the LSI Logic LSI
     reserves the right to charge an upgrade fee at a mutually agreed upon
     amount if the Version change is a Major Release with the exception of
     Firmware changes.

     9.0 Warranty Reimbursement

          9.1 LSI shall reimburse NCR for Parts as described below. LSI Logic
     Parts will be assigned to one of two Warranty Tiers.

             9.1.1 LSI will [*].

             9.1.2 Tier 3.  Parts that fall into this Tier are normally
        re-workable. LSI shall ensure that each Part has a serial number, model
        number, date of manufacture, or some other identification that will
        enable LSI to verify whether the part is under warranty. NCR will
        accumulate the consumed Parts and periodically contact LSI to get a
        Return Material Authorization (RMA). For Parts returned to LSI which are
        still under warranty, LSI shall provide to NCR, at NCR's option, for
        each Part shipped, (i) a replacement Part (new reworked to perform like
        new), or (ii) a refund or purchase credit equal to LSI's NCR price for
        the Part.

          9.2 Warranty Period.

             9.2.1 Specifics of General Warranty coverage for RAID products, all
        other current products, and Disk drives are provided in basic OEM
        Agreement and within Amendment 1 to the OEM Agreement.

             9.2.2 LSI shall provide a [*] warranty on new buy spare Parts and a
        [*] warranty on repaired Parts, and against defects in material and
        workmanship for all products and parts from the time of repair. LSI
        shall acknowledge its warranty obligation within [*] of receipt of a
        Part or Product returned by NCR. All warranty eligibility will be based
        on the Part Serial Number.

<Table>
<Caption>
          INITIAL    STATUS     TARGETED              TYPICAL
PRIORITY  RESPONSE   UPDATES   RESOLUTION             PROBLEM
 LEVEL     TO NCR    TO NCR    TIMEFRAME    [*]   CHARACTERIZATION
--------  --------   -------   ----------   ---   ----------------
<S>       <C>        <C>       <C>          <C>   <C>
  [*]       [*]        [*]           [*]    [*]         [*]
  [*]       [*]        [*]           [*]    [*]         [*]
  [*]       [*]        [*]           [*]    [*]         [*]
</Table>

<Table>
<S>    <C>                                       <C>    <C>
AGREED TO AND ACCEPTED
NCR CORPORATION                                  LSI LOGIC STORAGE SYSTEMS


By:    /s/ BRUCE A. LANGOS                       By:    /s/ R.L. ENGELBRECHT
       -----------------------------------------        -----------------------------------------


Name:  Bruce A. Langos                           Name:  R.L. Engelbrecht
       -----------------------------------------        -----------------------------------------


Title: Vice President                            Title: VP & GM
       -----------------------------------------        -----------------------------------------


Date:  11/19/01                                  Date:  10/15/01
       -----------------------------------------        -----------------------------------------
</Table>

                                        8
<PAGE>

           AMENDMENT A TO AMENDMENT ONE OF THE OEM PURCHASE AGREEMENT
                                    BETWEEN
      LSI LOGIC STORAGE SYSTEMS, INC. ("LSI") AND NCR CORPORATION ("NCR")

     This is Amendment A to Amendment One ("Amendment" dated February 15, 1995)
of the OEM Purchase Agreement ("Agreement") dated February 15, 1995 between
Symbios Logic Inc., now known as LSI Logic Storage Systems, Inc. ("LSI") and
AT&T Global Information Solutions Company, now known as NCR Corporation ("NCR"),
amended by prior amendments executed by the parties, is entered into by the
parties and made effective September 17, 2001, Amendment A to Amendment One
("Effective Date"). Capitalized terms used but not defined herein shall have the
meaning ascribed in the Agreement. This Amendment A to Amendment One shall run
co-terminous with the Agreement.

     Section 12.1.1 to 12.2.4 of Amendment One is deleted and replaced with the
following:

     12.1 General Warranty

          12.1.1 Class [*]. (The text of Paragraph 12.1 of the Agreement is
     inserted here in its entirety.)

          12.1.2 Class [*]. For Products of these types shipped after the
     Amendment Effective Date, LSI shall provide a [*] from the date of LSI'
     shipment to NCR.

          12.1.2.1 Immediately upon notification by NCR, LSI will verify the
     warranty entitlement on the system, and for those systems, which are so
     verified, will ship the required Part(s) and issue an RMA for the Part(s)
     to be returned to LSI. [*]. NCR shall be responsible for returning the
     failed Part(s) from the system in the same package or equivalent as the
     replacement Part(s) arrive in. LSI may bill NCR for any such warranty claim
     Part(s) not so returned to LSI within [*] at the applicable rate for NCR.

          12.1.2.2 LSI will conduct or subcontract failure analysis on all Parts
     returned from NCR.

     Section 12.8 of Amendment One is hereby deleted and replaced with the
following:

     12.8 Epidemic and Equipment Field Retrofit Orders (FRO). FRO's are required
modifications to installed Products and Parts to meet safety requirements,
correct a known or discovered data corruption design deficiency, or address a
quality issue impacting systems availability in the Field. LSI and NCR can issue
an FRO for any reason. The criteria for determining if labor reimbursement
applies will be mutually agreed upon and revised annually. If a Product or
Part's performance does not conform to the mutually agreed criteria, then LSI
will provide labor reimbursement for the FRO.

     In other instances where failure rates do not meet this criteria but the
impact to the end customer merits such treatment, it will be mutually agreed
upon by both parties whether an FRO and NCR's FRO labor cost reimbursement is
required. Methods for data collection and interpretation for FROs will be shared
with and agreed upon by both parties for the FRO to be considered valid.

     Either NCR or LSI may request that an FRO be generated. If an FRO is
needed, LSI will provide part numbers, estimated time of process and
instruction. NCR will be responsible for writing the actual FRO. [*]. Payment
will be based on the [*] to repair for each FRO. In the event that NCR and LSI
are unable to agree on the need for a reimbursable FRO, the parties may elect to
resolve the issue through arbitration as set forth in Paragraph 26.7 of the
Agreement.

                                        1
<PAGE>

     Exhibit E of the Agreement is hereby deleted.

<Table>
<S>     <C>                                        <C>    <C>
APPROVALS:
NCR CORPORATION                                    LSI LOGIC STORAGE SYSTEMS, INC.


By:     /s/ BRUCE A. LANGON                        Name:  /s/ R.L. ENGELBRECHT
        -----------------------------------------         -----------------------------------------


Title:  Vice President                             Title: VP & GM
        -----------------------------------------         -----------------------------------------


Date:   11/19/01                                   Date:  10/15/01
        -----------------------------------------         -----------------------------------------
</Table>

                                        2
<PAGE>

                ELEVENTH AMENDMENT TO THE OEM PURCHASE AGREEMENT
                    BETWEEN SYMBIOS LOGIC INC. AND AT&T GIS
                            DATED FEBRUARY 15, 1995

     This Eleventh Amendment ("Eleventh Amendment") to the OEM Purchase
Agreement dated February 15, 1995 ("Agreement") between Symbios Logic Inc., now
known as LSI Logic Storage Systems, Inc. ("LSI"), and AT&T Global Information
Solutions Company, now known as NCR Corporation ("NCR"), amended by prior
amendments executed by the parties, is entered into by the parties and made
effective the 16th day of April, 2001 ("Eleventh Amendment Effective Date").
Capitalized terms used but not defined herein shall have the meaning ascribed in
the Agreement. This Eleventh Amendment shall be coterminous with the Agreement.

     WHEREAS, the parties desire NCR to loan equipment to LSI in support of
LSI's testing and certification of NCR's [*]; and

     WHEREAS, NCR and LSI desire to amend and addend the Agreement to add this
new list of supporting equipment to "Exhibit G: Equipment Loaner Agreement" of
the Fifth Amendment to this OEM Purchase Agreement ("Fifth Amendment");

     NOW, THEREFORE, the parties agree as follows:

          1.0 For the loan of equipment by NCR to LSI, add "Attachment 1D to
     Loaner Agreement" in its entirety, as attached hereto, to the Fifth
     Amendment's Exhibit G: Equipment Loaner Agreement.

          1.1 Term of Use.  The term of use of the Equipment will be effective
     as of the Eleventh Amendment Effective Date and will terminate [*] from the
     Effective Date, unless NCR earlier terminates or extends such dates.

          1.2 Location of Equipment.  The Equipment will be located at LSI's
     facility at:

           LSI Logic Storage Systems, Inc.
           3718 North Rock Rd.
           Wichita, KS 67226

          1.2 Throughout the Agreement, references to Attachment 1 to Exhibit G:
     Equipment Loaner Agreement, will refer equally to the added Attachment 1D.

     Except as amended by this Eleventh Amendment, all other terms and
conditions of the Agreement and all prior amendments thereto remain the same.

     THE PARTIES HAVE CAUSED THIS ELEVENTH AMENDMENT TO BE EXECUTED BY THEIR
AUTHORIZED REPRESENTATIVES EFFECTIVE AS OF THE ELEVENTH AMENDMENT EFFECTIVE
DATE.

<Table>
<S>       <C>                                      <C>       <C>
NCR CORPORATION                                    LSI LOGIC STORAGE SYSTEMS, INC.
(formerly AT&T Global Information Solutions        (formerly Symbios, Inc.)
Company)


Signed:   /s/ ALAN CHOW                            Signed:   /s/ R.L. ENGELBRECHT
          -----------------------------------------          -----------------------------------------


Printed:  Alan Chow                                Printed:  R.L. Engelbrecht
          -----------------------------------------          -----------------------------------------


Title:    VP & GM Teradata Dev Div                 Title:    VP & GM
          -----------------------------------------          -----------------------------------------


Date:     4/11/01                                  Date:     4/17/01
          -----------------------------------------          -----------------------------------------
</Table>

                                        1
<PAGE>

             ATTACHMENT 1D TO EQUIPMENT LOANER AGREEMENT EXHIBIT G
                            (ADDED IN AMENDMENT #5)

                                      [*]
<PAGE>

               FIFTEENTH AMENDMENT TO THE OEM PURCHASE AGREEMENT
        BETWEEN SYMBIOS LOGIC INC. AND AT&T GIS DATED FEBRUARY 15, 1995

     This Fifteenth Amendment ("Fifteenth Amendment") to the OEM Purchase
Agreement dated February 15, 1995 ("Agreement") between Symbios Logic Inc., now
known as LSI Logic Storage Systems, Inc. ("LSI"), and AT&T Global Information
Solutions Company, now known as NCR Corporation ("NCR"), amended by prior
amendments executed by the parties, is entered into by the parties and made
effective the 17th day of September, 2001 ("Fifteenth Amendment Effective
Date"). Capitalized terms used but not defined herein shall have the meaning
ascribed in the Agreement. This Fifteenth Amendment shall be coterminous with
the Agreement.

     WHEREAS, the parties desire NCR to loan equipment to LSI in support of
LSI's exhibiting of [*]; and

     WHEREAS, NCR and LSI desire to amend and addend the Agreement to add this
new list of supporting equipment to "Exhibit G: Equipment Loaner Agreement" of
the Fifth Amendment to this OEM Purchase Agreement ("Fifth Amendment");

     NOW, THEREFORE, the parties agree as follows:

          1.0 For the loan of equipment by NCR to LSI, add "Attachment 1G to
     Loaner Agreement" in its entirety, as attached hereto, to the Fifth
     Amendment's Exhibit G: Equipment Loaner Agreement.

          1.1 Term of Use. The term of use of the Equipment will be effective as
     of the Fifteenth Amendment Effective Date and will terminate [*] from the
     Effective Date, unless NCR earlier terminates or extends such dates.

          1.2 Location of Equipment. The Equipment will be located at Partners
     2001 Exhibit at:

              LSI Logic Storage Systems, Inc.
              WDW Dolphin Convention Center, Booth #419
              1500 Epcot Resorts Boulevard
              Lake Buena Vista, FL 32830

          1.3 Throughout the Agreement, references to Attachment 1 to Exhibit G:
     Equipment Loaner Agreement, will refer equally to the added Attachment 10.

     Except as amended by this Fifteenth Amendment, all other terms and
conditions of the Agreement and all prior amendments thereto remain the same.

     THE PARTIES HAVE CAUSED THIS FIFTEENTH AMENDMENT TO BE EXECUTED BY THEIR
AUTHORIZED REPRESENTATIVES EFFECTIVE AS OF THE FIFTEENTH AMENDMENT EFFECTIVE
DATE.

<Table>
<S>                                             <C>
NCR CORPORATION                                 LSI LOGIC STORAGE SYSTEMS, INC.
(FORMERLY AT&T GLOBAL                           (FORMERLY SYMBIOS LOGIC, INC.)
INFORMATION SOLUTIONS COMPANY)

           Signed: /s/ ALAN CHOW                        Signed: /s/ R.L. ENGELBRECHT
--------------------------------------------    --------------------------------------------

Printed: Alan Chow                              Printed: R.L. Engelbrecht
        ------------------------------------    ------------------------------------

Title: VP & GM, Teradata Dev Div                Title: VP & GM
      --------------------------------------    --------------------------------------

Date: 9/17/01                                   Date: 9/18/01
      --------------------------------------    --------------------------------------
</Table>

                                        1
<PAGE>

             ATTACHMENT 1G TO EQUIPMENT LOANER AGREEMENT EXHIBIT G
                            (ADDED IN AMENDMENT #5)

                             EQUIPMENT DESCRIPTION

                                      [*]
<PAGE>

               SIXTEENTH AMENDMENT TO THE OEM PURCHASE AGREEMENT
        BETWEEN SYMBIOS LOGIC INC. AND AT&T GIS DATED FEBRUARY 15, 1995

     This Sixteenth Amendment ("Sixteenth Amendment") to the OEM Purchase
Agreement dated February 15, 1995 ("Agreement") between Symbios Logic Inc., now
known as LSI Logic Storage Systems, Inc. ("LSI"), and AT&T Global Information
Solutions Company, now known as NCR Corporation ("NCR"), amended by prior
amendments executed by the parties, is entered into by the parties and made
effective the 11th day of February, 2002 ("Sixteenth Amendment Effective Date").
Capitalized terms used but not defined herein shall have the meaning ascribed in
the Agreement. This Sixteenth Amendment shall be coterminous with the Agreement.

     WHEREAS, the parties desire LSI TO LOAN EQUIPMENT TO NCR in support of
NCR's certification and release of the [*]; and

     WHEREAS, NCR and LSI desire to amend and addend the Agreement to add this
new list of supporting equipment to "Attachment A: Symbios, Inc. Equipment Loan
Agreement" of the Eighth Amendment to this OEM Purchase Agreement ("Eighth
Amendment");

     NOW, THEREFORE, the parties agree as follows:

          1.0 For the loan of equipment by LSI to NCR, add "Attachment A-3 to
     Symbios, Inc. Equipment Loan Agreement", as attached hereto, to the Eighth
     Amendment,

          2.1 Term of Use.  The term of use of the Equipment will be effective
     as of the Sixteenth Amendment Effective Date and will terminate 135 days
     from the Effective Date, unless LSI earlier terminates or extends such
     dates.

          2.2 NCR reserves the right to purchase the Equipment at the conclusion
     of the loan period. The asset values listed in Attachment A-3 are for
     estimating purposes only. The actual purchase price will be as stated in
     the LSI published price list in effect at the beginning of the Equipment
     loan period. Attachment A-3 Erosion and Refurbishment prices will be waived
     if NCR purchases the Equipment.

          2.3 Location of Equipment.  The Equipment will be located at NCR's
     facility at:

           NCR Corporation
           17095 Via del Campo
           San Diego, CA 92127

          2.3 Throughout the Agreement, references to Attachment A to Loaner
     Agreement, will refer equally to the added Attachment A-3.

     Except as amended by this Sixteenth Amendment, all other terms and
conditions of the Agreement and all prior amendments thereto remain the same.

     THE PARTIES HAVE CAUSED THIS SIXTEENTH AMENDMENT TO BE EXECUTED BY THEIR
AUTHORIZED REPRESENTATIVES EFFECTIVE AS OF THE SIXTEENTH AMENDMENT EFFECTIVE
DATE.

<Table>
<S>        <C>                                        <C>        <C>
NCR CORPORATION (FORMERLY AT&T GLOBAL                 LSI LOGIC STORAGE SYSTEMS, INC. (FORMERLY
INFORMATION SOLUTIONS COMPANY)                        SYMBIOS LOGIC, INC.)

Signed:               /s/ ALAN CHOW                   Signed:            /s/ R.L. ENGELBRECHT
           ------------------------------------                  ------------------------------------

Printed:   Alan Chow                                  Printed:   R.L. Engelbrecht
           ------------------------------------                  ------------------------------------

Title:     Vice President, Teradata R&D               Title:     VP & GM
           ------------------------------------                  ------------------------------------

Date:      2/12/02                                    Date:      2/21/02
           ------------------------------------                  ------------------------------------
</Table>

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<PAGE>

               EIGHTEENTH AMENDMENT TO THE OEM PURCHASE AGREEMENT
                                 ("AGREEMENT")
              BETWEEN LSI LOGIC STORAGE SYSTEMS, INC. ("LSI") AND
                   NCR CORPORATION, ("NCR") FORMERLY AT&T GIS

     This Eighteenth Amendment ("Eighteenth Amendment") to the OEM Purchase
Agreement dated February 15, 1995 ("Agreement") between Symbios Logic Inc., now
known as LSI Logic Storage Systems, Inc. ("LSI"), and AT&T Global Information
Solutions Company, now known as NCR Corporation ("NCR"), amended by prior
amendments executed by the parties, is entered into by the parties and made
effective August 1, 2002 (Eighteenth Amendment "Effective Date"). Capitalized
terms used but not defined herein shall have the meaning ascribed in the
Agreement. This Eighteenth Amendment shall be coterminous with the Agreement.

     1.0 The Tenth Amendment to the Agreement, with an effective date of
September 17, 2001, is hereby renumbered as the Seventeenth Amendment to correct
duplicate numbering.

     2.0 Section 3.0, Technical Support.  Paragraph 3.7, which was added in
Amendment #1 and revised in Amendment #2, is hereby changed to read as follows:

          3.7 Loaner Units.

          3.7.1 LSI will loan NCR equipment for various purposes related to this
     Agreement (including, but not limited to, evaluation and benchmarking), and
     may loan NCR certain related hardware, software, firmware, documentation,
     and information for NCR's use with that equipment. The total value of the
     equipment permitted to be loaned to NCR is based on [*] ("Loaner Pool
     Value"). The value of any additional equipment permitted to be loaned over
     and above the Loaner Pool Value shall be calculated at [*]. Such
     limitations may be changed at any time upon mutual written agreement of the
     parties. Any such change shall not affect loaned equipment in NCR's
     possession as of the effective date of such change, which equipment NCR
     shall be permitted to continue to use until the expiration of the
     applicable loan period. In the event that the total value of the equipment
     loaned to NCR is permitted to [*], NCR shall pay to [*] which needs to be
     approved by NCR. [*]. Each piece of equipment may be used by NCR for a
     period of [*] commencing on the date of shipment by LSI and ending upon the
     date of return of the equipment to LSI. NCR shall issue orders for these
     loaner units from a single point of contact. When returned to LSI, the
     units will be refurbished to "as-new" condition and will have the same
     warranty as a new unit. Refurbishment charges to NCR will not exceed [*]
     per module. Units refurbished by LSI will be completely updated to the
     latest revision levels. Returned units are also subject to actual drive
     erosion charges, to the extent that such charges are stated in the
     applicable Equipment Request for NCR (of the type marked Exhibit I and
     attached hereto) which has been signed by NCR and LSI, which will be
     specified in the individual "Equipment Request for NCR" form issued by LSI
     in conjunction with each loan. If a loaner unit is not returned within [*],
     LSI will invoice NCR for the loaner unit(s) at full NCR OEM value and the
     loaner return will not be accepted at the LSI factory. NCR shall be
     responsible for shipping charges for the initial shipment out and the
     return shipment associated with all loaner equipment.

          3.7.2 LSI will provide standard warranty coverage during the loan
     period.

          3.7.3 Unless otherwise agreed by NCR in writing, NCR will not buy
     refurbished units of Products that were evaluated by anyone other than NCR.
     LSI shall apply refurbished units used previously through the NCR loaner
     program to new NCR orders. NCR may direct that certain Orders not be filled
     with refurbished units by including a statement to that effect on the Order
     itself and/or by providing LSI a list of customers who will not accept
     refurbished systems. Notwithstanding the foregoing, NCR agrees to accept
     all refurbished units which have not been shipped against NCR Orders after
     [*] from the date of refurbishment by LSI, and shall be billed at and
     agrees to pay full price for such units.

                                        1
<PAGE>

A new paragraph 3.7.4 is added as follows:

          3.7.4 The parties agree that when LSI agrees to loan equipment to NCR
     the terms of this Agreement will apply and that the parties will separately
     execute an "Equipment Request for NCR" of the type marked Exhibit I and
     attached hereto, for all loans by LSI to NCR. In the event of a conflict
     between the terms and conditions of this Agreement and the applicable
     Equipment Request for NCR, the terms and conditions of the applicable
     Equipment Request for NCR will apply.

A new paragraph 3.7.5 is added as follows:

          3.7.5 NCR may loan LSI equipment for various purposes related to this
     Agreement (including, but not limited to, testing and certification of NCR
     products), and may loan LSI certain related hardware, software, firmware,
     documentation, and information for LSI's use with that equipment. The
     parties agree that when NCR agrees to loan equipment to LSI the terms of
     this Agreement, and specifically those of Exhibit G -- Equipment Loaner
     Agreement added in the Fifth Amendment to the Agreement, will apply and
     that the parties will separately execute an "Equipment Request for LSI" of
     the type marked Exhibit J and attached hereto, for all loans by NCR to LSI.
     In the event of a conflict between the terms and conditions of this
     Agreement and the applicable Equipment Request for LSI, the terms and
     conditions of the applicable Equipment Request for LSI will apply.

A new paragraph 3.7.6 is added as follows:

          3.7.6 The terms of this Amendment shall be subject to and open for
     review and negotiation by either party at the [*]. Any changes to the terms
     must be mutually agreed upon in writing by both parties. If mutual
     agreement cannot be reached on revised terms, then the disputed terms will
     be escalated to senior management of both parties for resolution.

     Except as amended by this Eighteenth Amendment, all other terms and
conditions of the Agreement and all prior amendments thereto remain the same.

     The Agreement and this Eighteenth Amendment represent the complete and
exclusive statement of the agreement of LSI and NCR regarding the subject matter
thereof and hereof, and supersede all prior oral and written agreements,
understandings, and communications about it. The terms of this Eighteenth
Amendment may only be modified in a written document signed by authorized
representatives of both parties.

     THE PARTIES HAVE CAUSED THIS EIGHTEENTH AMENDMENT TO BE EXECUTED BY THEIR
AUTHORIZED REPRESENTATIVES EFFECTIVE AS OF THE EIGHTEENTH AMENDMENT EFFECTIVE
DATE.

<Table>
<S>     <C>                                         <C>     <C>
AGREED TO AND ACCEPTED:
NCR CORPORATION                                     LSI LOGIC STORAGE SYSTEMS

By:               /s/ BRUCE LANGOS                  By:              /s/ THOMAS GEORGENS
        -------------------------------------               -------------------------------------

Name:   Bruce Langos                                Name:   Thomas Georgens
        -------------------------------------               -------------------------------------

Title:  Vice President, Business Operations &       Title:  President, LSI Logic Storage Systems,
        Intellectual Property Management                    Inc.
        -------------------------------------               -------------------------------------

Date:   8/16/02                                     Date:   08/02/02
        -------------------------------------               -------------------------------------
</Table>

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